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Biology  Endoreduplication  Endosperm

internal skeleton
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...

endoskeleton An internal supporting skeleton with muscles on the outside; in vertebrates, consists of the skull, spinal column, ribs, and appendages.

endoskeleton an internal support system in the echinoderms and most vertebrates that may include a framework of bones and cartilage that serves as a point of attachment for muscle.

Endoskeletons are enclosed in other tissues. The human endoskeleton does not offer much protection from predators, but it does a good job of keeping the body from collapsing into a helpless pile. It also provides sites for attachment of muscles.

endoskeleton A skeleton that lies beneath the surface of the body (e.g., the bony skeleton of vertebrates and the calcium carbonate skeleton of echinoderms); contrasts with exoskeleton.

Endoskeleton the supportive internal framework of an organism
Endosperm a nutritious tissue found in the seeds of flowering plants
Endotherm an animal that can regulate its body temperature using physiological mechanisms ...

The endoskeleton and muscles form an organ system (the musculoskeletal system) that permits rapid and efficient movement. The pectoral and pelvic fins of fishes evolved into jointed appendages that allowed vertebrates to move onto land.

The vertebrate body is supported by an endoskeleton made of cartilage and bone. (Sharks and their relatives use only cartilage.)
The bones of the human skeleton perform several functions: ...

The skeleton may be an endoskeleton, an exoskeleton or a hydrostatic skeleton. The support system will be adapted to methods of locomotion for a particular animal (e.g, flying, swimming, climbing, and walking).

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.

A human skeleton - (endoskeleton)
In biology, the skeleton or skeletal system provides a strong, internal framework that supports the body, makes up about 20 percent of its weight, and consists of 206 bones.

They lack spines, the endoskeleton is much reduced, and the oral-aboral axis is elongated.
However, they do have five rows of tube feet, like other echinoderms, and other shared features.

Some of the minerals such as calcium and phosphate are used in larger amounts by organisms when they are used to build structures such as bones and shells (exo and endoskeletons).

Jellyfish and worms have skeletons which are hydrostatic and allow the organism to push water in or out of their bodies. Arthropods have exoskeletons. Humans are vertebrates and have an endoskeleton made mainly of collagen.

See also: See also: Skeleton, Blood, Tissue, Muscle, Animal

Biology  Endoreduplication  Endosperm

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