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Humans Endoskeletons Skeletal systems come in many forms. You have a skeleton inside of your body (endoskeleton) made up of bones. Insects and crustaceans have skeletal systems on the outside or their bodies (exoskeletons) that are made of hard plates. Organisms like starfish do not have bones or plates. They have skeletons made up of fluids inside of tubes within their bodies. The fluid skeletal systems are called hydrostatic. All animals that live outside of the water need some kind of skeletal system to support or protect them.
Other Animal With endoskeletons Bodies and Bones Become a skeleton detective investigating different animal skeletons and skulls, and the role bones play as part of an animal's body. Compare explore how our bones help us and what can be done to keep them healthy. An endoskeleton is a structure that holds an animal from inside
exoskeleton Insects have exoskeletons made of a substance called chitin. The exoskeletons of crabs, lobsters, shrimp, spiders, ticks, mites, scorpions, and related animals are also made of chitin. While exoskeletons are hard and stiff, they also have joints, or bendable sections. These joints allow the animals to move easily. The exoskeletons of land animals also have small Brea.
Joints and Muscles Did you know you have more than 600 muscles in your body? They do everything from pumping blood throughout your body to helping you lift your heavy backpack. You control some of your muscles, while others — like your heart — do their jobs without you thinking about them at all. Muscles are all made of the same material, a type of elastic tissue (sort of like the material in a rubber band). Thousands, or even tens of thousands, of small fibers make up each muscle.
ball and socket • Ball & Socket Joint • Ball-and-socket joints are a special class of joints that enjoy the highest freedom of motion in the body thanks to their structure. The shoulder and hip joints are the only ball-and-socket joints in the human body due to the need for great motion at the end of the body’s limbs and the vast amount of needed to move and support such flexible joints.
hinge • Hinge Joint • A hinge joint is a common class of joint that includes the ankle, elbow, and knee joints. Hinge joints are formed between two or more bones where the bones can only move along one axis to flex or extend. • The simplest hinge joints in the body are the joints found of the fingers and toes. In these hinge joints, the bones are able to flex to decrease the angle between them - like when making a fist or curling the toes - and extend to increase their angle to about 180 degrees when holding the foot or hand flat....
invertebrates Invertebrates Invertebrates are animals that do not have a backbone or a bony skeleton. Scientists have identified close to one million living species of invertebrates but this represents only a small fraction of the total number of invertebrates alive today.
vertebrates Animals with an internal skeleton made of bone are called vertebrates. Vertebrates include fish, amphibians, reptiles, birds, mammals, primates, rodents and marsupials. Although vertebrates represent only a very small percentage of all animals, their size and mobility often allow them to dominate their environment. Click on the picture or name of the animals below for more information.
birds There are over 8,000 species of birds. Birds have 3 major differentiating characteristics: wings for flight, feathers, and a beak rather than teeth. Birds have adapted their vertebrate skeleton for flight. Their bones and skull are very thin, making their bodies extremely light.
fish • Fish are vertebrate animals that live in the water. Vertebrate means they have a spinal cord surrounded by bone or cartilage. • Fish have gills that from the water around them. • There are over 30000 known species of fish.
