A butterfly's skeleton is not inside their body, but on the outside and is called the exoskeleton.
Endoskeletons are made up of bones and cartilage and are found inside the body. Unlike exoskeletons, endoskeletons grow with us as we grow. Animals with endoskeletons, like humans, are vertebrates, which means animals that have backbones. Other animals with endoskeletons include dolphins, whales, fish, and birds.
Like almost all insects, butterflies are protected by an external skeleton. Unlike humans, whose bones are beneath soft tissues forming an endoskeleton, the soft tissue of butterflies is encased in a hard shell called an exoskeleton.
Elephants have long eyelashes to help avert blowing sand, dirt, and debris from the eyes. In addition to the upper and lower eyelids, elephants have a “third eyelid” which moves vertically across the eye. These eyelids function to protect the eye when feeding, bathing, and dusting (cooling down).
Slugs and snails are invertebrates that creep around on a single, muscly foot. They have tentacles on their heads that sense their surroundings. Most slugs have no skeleton at all, but snails have spiral-shaped shells on their backs, in which they can hide for protection.
Animals with this type of skeleton include crustaceans like crabs and lobsters. These animals have an endoskeleton. Initially, all endoskeletons were made of cartilage, which is a dense rubbery type of tissue. Later, endoskeletons of bone evolved.
The skeleton of the killer whale is of the typical delphinid structure, but more robust. Its integument, unlike that of most other dolphin species, is characterized by a well-developed dermal layer with a dense network of fascicles of collagen fibres.
Concerning their skeleton - slugs, like all molluscs, dont have an internal skeleton and although some books suggest that their shell - if they have one - is an external skeleton (exoskeleton) its main function is defence rather than body support.
Invertebrates include many differentspecies of animals, such as jellyfish, slugs, snails, corals, mussels, crabs and lobstersand butterflies. Although these animalsvary widely in physical characteristics, they share the common feature of not having any bones.
Theories abound that elephants are afraid of mice because the tiny creatures nibble on their feet or can climb up into their trunks. However, there's no evidence to back up either of those claims. It's more likely that elephants, which have relatively poor eyesight, simply become startled when mice dart past.
Once it reaches adulthood, the female and male elephants are known by different terms. A male elephant is called a bull elephant, and a female elephant is a cow.
The ventricle is the larger of the two types of heart chambers (the smaller one being the atrium) and is responsible for pumping blood out of the heart. Secondly, the venae cavae (the veins carrying blood from the lower half of the body into the right atrium) are paired rather than singular.
Elephants are thought to be highly altruistic animals that even aid other species, including humans, in distress. Cynthia Moss has often seen elephants going out of their way to avoid hurting or killing a human, even when it was difficult for them (such as having to walk backwards to avoid a person).
Elephants eat roots, grasses, fruit, and bark, and they eat a lot of these things. An adult elephant can consume up to 300 pounds of food in a single day. Because elephants eat so much, they're increasingly coming into contact with humans.
Rhinos, hippos, pigs, peccaries, horses, zebras, donkeys and tapirs are classified in clade Laurasiatheria, while elephants, hyraxes, manatees and dugongs are classified in clade Afrotheria. Cuvier added horses to the order.
Elephant populationsWith only 40,000-50,000 left in the wild, the species is classified as endangered.
Teeth consist mostly of hard, inorganic minerals like calcium. They also contain nerves, blood vessels and specialized cells. But they are not bones. Teeth don't have the regenerative powers that bones do and can't grow back together if broken.
The skeleton consists of both fused and individual bones supported and supplemented by ligaments, tendons, muscles and cartilage. It serves as a scaffold which supports organs, anchors muscles, and protects organs such as the brain, lungs, heart and spinal cord.
The enamel on your teeth, which are considered part of your skeletal system, is actually stronger than bones. Enamel protects the delicate nerves and tissue inside your teeth. Inch for inch, your teeth can take more wear and tear than any of your other bones.
The adult human skeleton is made up of 206 bones. These include the bones of the skull, spine (vertebrae), ribs, arms and legs. Bones are made of connective tissue reinforced with calcium and specialised bone cells. Most bones also contain bone marrow, where blood cells are made.
Humans have 206 bones, while the average cat has about 244 bones. Sometimes, it's the number of bones and muscles that makes a difference in how an animal moves around. We cats, for example, have more bones in our spine than humans do. So, sometimes it's the size and shape of the bone makes all the difference.
The hard part present outside the body which protects the soft tissues and muscles is called the
exoskeleton.
Difference Between Endoskeleton And Exoskeleton.
| Endoskeleton | Exoskeleton |
|---|
| Endoderm | Ectoderm |
| Made of |
| Phosphorous and calcium | Calcified shells, scales, cuticle |
| Presence |
Many soft-bodied organisms or parts of organisms (e.g. terrestrial and marine worms, cnidarians, echinoderms, bivalves, gastropods and nematodes) possess a hydrostatic skeleton. Hydrostatic skeletons are characterized by a liquid-filled internal cavity surrounded by a muscular body wall (Kier, 2012).
A skeleton is the hard structure that protects the internal organs of a living thing. Skeletons can be inside the body or outside the body. In mammals, which include humans, the skeleton is made of bones. A skeleton that is on the inside is called an endoskeleton.
If you've ever seen a real skeleton or fossil in a museum, you might think that all bones are dead. Although bones in museums are dry, hard, or crumbly, the bones in your body are different. The bones that make up your skeleton are all very much alive, growing and changing all the time like other parts of your body.
The male's head is broader between the eyes and forehead, whereas the female's forehead forms a sharper angle. These disparities are more pronounced on adult elephants than younger elephants, where it can be more challenging to identify these nuances. Female and male Asian elephants can have small tusks.
A socially excited elephant lifts and rapidly flaps her ears and widens her eyes. Tails: Just like a dog, when an elephant's tail is swishing from side to side swatting away flies, it is happy. As soon as the tail goes stiff, normally held out to one side, it means that the elephant is anxious.
Elephant Warning Signs and General Behaviour
- Rocking of the foot (swings one of the feet up and down) Often associated with kicking up dust.
- HOLDS (prolonged) his/her ears out (remember elephants control their temperature by FLAPPING the ears. )
- Shacking of the head.
- Tail being held out at 90 % (stiff tail)
- Trumpeting.
African elephants live in diverse habitats including wetlands, forest, grassland, savanna and desert across 37 countries in southern, eastern, western and central Africa. The Asian elephant is found across 13 countries in South, Southeast and East Asia.
