Beautiful animals - starfish
Animals without blood in the brain
Animals are a group of living things. They generally feed on organic matter, can feel, can move, can move autonomously, or can move things. Animals also have a variety of behaviors that can be seen as animal responses to stimuli. Behavior is the science of animal behavior. One of the more famous behavioral theories is the instinct theory proposed by Conrad Lorenz. The following is a detailed introduction to it, take a look!
In the seas all over the world, there lives a kind of animal and its beauty - the starfish. Most of the starfish we usually see are in the shape of a pentagram, distributed in various places in the sea. So do you know anything about starfish?
1、Non-fish
What do you know about the starfish species after the scientists' exploration?
One of the most beautiful creatures on Earth, starfish live in water, which is one of the things that makes them similar to fish. Starfish are not fish, they have no gills, fins, or scales and belong to echinoderms.
2, no brain blood
It may sound absurd to live without the presence of blood and brains, but starfish have an unusual and simple way of surviving. Sea water is a substitute for blood for their survival, which is maintained by a special 'water vascular system' in the body's life.
3. Body regeneration
When starfish come into contact with predators, they may lose their arms if they are trapped in a threatening environment. It may take days, months, or even years for the arm to fully regenerate. Another unique feature of starfish is the regeneration of their arms, and sometimes their entire bodies! This property can be used to their advantage in a variety of situations. For example, sun starfish can have up to 40 arms!
4. With eyes
With no blood, no brain, and not even a central nervous system, starfish eyes can look a bit unusual. Their eyes are located at the end of their arms, and the starfish's eyes can detect different kinds of light, which means they can sense light and darkness, and avoid predators well.
5. Digestive system
What do you know about the starfish species after the scientists' exploration? Sheet 2
Their mouths are so small that underneath their bodies, a starfish can't feed only through its mouth. Interestingly, the starfish has two stomachs, one for digestion and the other to expand itself and engulf its prey. With this unique digestive system, it can digest complex organisms and break down food more simply, and the starfish's stomach can even digest food outside its body.
6, survival environment
Starfish are not suitable for freshwater, instead, they prefer salt water. If you accidentally put a starfish into fresh water, it will eventually die. To survive, they prefer to stay in saltwater environments and tend to gravitate to coral reefs, wet sandy areas, and other saltwater areas.
7、Weight
From 5 inches to 11 inches, the size of a starfish may result in a heavy body. The average lifespan of a starfish is 35 years! The usual weight is 5-6 pounds, and there are about 2,000 species, and 11 pounds or even more.
8, skin
After the scientists' exploration, what do you know about the species of starfish? Sheet 3
The outer layer of a starfish is made up of calcium carbonate, so the skin of a starfish is hard. Some starfish even add a few spines to their skin as a layer of armor to hide from predators.
9、Movement
With hundreds of tiny feet at the base and end of each arm, starfish move much faster than you might think! Starfish move with hundreds of tube feet, which also help to catch and hold prey.
10. Shape
Not all starfish are star-shaped, however, there are always exceptions. Some starfish are orb-shaped, striped, polygonal, etc., but these are similar to the genetic characteristics of the average five-pointed starfish.
About the Creator
Sukkning
Science will give mankind's greatest gift is？ Is to make the power of humans believe that truth。
UK Weather Live: Ice Warnings Issued Across Country as Britain Braces for Storm Goretti to Bring Heavy Snow
Britain is preparing for a significant weather event as Storm Goretti approaches, bringing forecasts of heavy snow, freezing temperatures, and widespread ice warnings. The UK Met Office has issued alerts across much of the country, urging residents to take precautions and prepare for potentially disruptive conditions over the coming days. From schools to transport networks, authorities are bracing for the impact of the storm, which is expected to hit both urban and rural areas with equal intensity. Storm Goretti: What We Know Meteorologists describe Storm Goretti as a winter system with strong winds and the potential for significant snow accumulation. The storm is forecast to sweep across the UK, starting in the northern regions before moving southwards, leaving a trail of icy roads and hazardous conditions. Snowfall could reach several inches in higher altitudes, while temperatures are expected to drop below freezing in many parts of the country. The Met Office has issued severe weather warnings, including amber alerts for ice, highlighting the risks to both drivers and pedestrians. “We are expecting treacherous conditions on roads and pavements, with black ice forming in the early hours and throughout the day,” warned a spokesperson. “Residents should avoid unnecessary travel where possible and take extra care if venturing outside.” Impact on Travel and Transport Transport services are already feeling the effects of the impending storm. Rail operators have warned of potential delays and cancellations, particularly in northern England and Scotland, where snow is expected first. Airports across the UK are on high alert, with staff preparing to de-ice aircraft and manage potential flight disruptions. Road networks are particularly vulnerable, with authorities advising motorists to plan ahead, drive cautiously, and carry essential winter supplies. Gritting teams have been deployed across the country, but with widespread ice warnings, officials emphasize that caution is still paramount. Emergency services have also increased staffing in anticipation of weather-related accidents and incidents. Public transport users are urged to check service updates regularly, as bus routes and train lines may be altered or suspended depending on local conditions. For commuters, remote working arrangements are recommended where feasible, and schools are considering closures or delayed openings to ensure student safety. Preparing for Storm Goretti Experts recommend that residents take proactive measures to prepare for the storm. This includes checking heating systems, ensuring adequate food and water supplies, and keeping mobile devices charged in case of power outages. Walking and driving in icy conditions can be dangerous, so wearing appropriate footwear, using handrails, and avoiding unnecessary journeys is strongly advised. Local councils and community groups are also mobilizing to support vulnerable populations, including the elderly and those with mobility issues. Volunteers are being organized to deliver essential supplies and check on residents who may be isolated due to snow or ice. The Broader Context: UK Winter Patterns Storm Goretti is part of a pattern of increasingly erratic winter weather affecting the UK in recent years. While Britain typically experiences snow and frost in winter, the intensity and unpredictability of storms have grown, challenging emergency services and infrastructure alike. Climate experts suggest that shifting weather patterns, influenced by global climate change, are contributing to more extreme and sudden weather events across Europe. The combination of heavy snow, ice, and cold temperatures poses risks not only to travel but also to public health. Hypothermia, slips, and falls become more likely, and hospitals often report higher numbers of winter-related injuries during periods of severe weather. Health authorities are therefore reminding the public to stay warm, stay safe, and seek medical attention if needed. Looking Ahead: What to Expect Forecasts indicate that Storm Goretti will continue to affect the UK for several days, with snow accumulation and ice risks persisting into the weekend. The Met Office will continue to issue live updates, with warnings potentially upgraded or extended as conditions evolve. Authorities stress that public vigilance is crucial. Staying informed, taking precautionary measures, and avoiding unnecessary risks are essential to minimizing the storm’s impact. Residents are encouraged to follow official guidance, heed transport updates, and check in on vulnerable neighbors or family members during the storm. In conclusion, Storm Goretti serves as a stark reminder of the challenges that winter weather can bring to Britain. With heavy snow, freezing temperatures, and widespread ice warnings, preparation and caution are key. By staying informed and following official advice, Britons can navigate the storm safely, protecting themselves and their communities as the country weathers yet another severe winter event.
By Fiazahmedbrohi 6 days ago in Earth
Regenerative Agriculture's Quiet Revolution
by Futoshi Tachino Regenerative agriculture — a holistic approach to farming that restores soil health, biodiversity, and resilience — has rapidly gained traction in recent years. This shift remains largely underappreciated by the public; in a 2024 survey, around 43% of U.S. consumers had never heard of regenerative agriculture (and another 28% had only minimal awareness) [4]. Despite this low profile, tangible developments in regenerative farming are delivering robust results. Farmers are proving that it’s possible to maintain high yields with fewer chemical inputs, improve profitability, and enhance ecological outcomes — all at once. This article explores the evidence-backed progress of regenerative agriculture across regions, the policies and technologies driving its adoption, and why this overlooked sustainability success story deserves greater recognition.
By Futoshi Tachinoa day ago in Earth
Comments
There are no comments for this story
Be the first to respond and start the conversation.