What is then difference between crab's skeleton and human's skeleton?

Answer 1

Crayfish have an exoskeleton, meaning that their support structure is found on the outside of their body. The skeleton is composed of one large body covering that is scleritized (hardened) in some places and left unslceritized (flexible) in others to allow for movement at joints. Humans have an endoskeleton, meaning that their support structure is found internally. The skeleton is made of hard bones that are held together at the joints by ligaments and muscles.

Answer 2

the man is taller
Because they both have the same number of bones
A humans skeleton is like a frogs skeleton because they both have a spine and femurs.
they have the same number of bones
Bones of the limbs are enlarged or fused in frog. The fibula and tibia are fused to a so-called tibiofibula and the ulna and radius are fused and are called radioulna. The vertebrals of frogs are compressed and they lack tailbone, unlike most vertebrates. Another difference is the pelvis of frogs, wich has a triple forked structure.
Humans don't have the same skeletons as frog, but there are many points of similarity, such as spinal column, ribs, pelvis, leg and arm bones, fingers, etc. Why are they similar? Becasue frogs and huimans are descended from common ancestrors that lived many millions of years ago.
Some of the same bones exist in frogs as in humans and in the same places. They also have some of the same internal organs. Their bone marrow also produces the red and white blood cells needed.

Answer 3

1. A crab has an exoskeleton, i.e. a skeleton which lies outside of its body A human has an endoskeleton, i.e. a skeleton which lies inside of its body

2. The human skeleton is capable of growing as the human does

A crab's exoskeleton does not grow therefore the animal must shed (or moult) its skeleton to grow

3. The human skeleton is made up of bones

The crab's skeleton is made of sections

4. The crab's exoskeleton is hardened by chitin (calcium carbonate)

Human skeletons are hardened by calcium

5. The functions of the crab's exoskeleton are protection (defense against predators), excretion, sensation, support, feeding and preventing desiccation (dehydration or drying out)

The functions of the human skeleton are support, protection of vital organs, movement, mineral storage, and blood cell production

Answer 4

A crayfish and a humans skeletons are alike in that provide protection.

Answer 5

A skeleton of a fish has a rib cage and a spine just like the human skeleton.

Answer 6

when your still inside your mothers fetus you look like a fish and you form like a fish plus the fish bones are nothing but your back skeleton just flatten

Answer 7

Humans and crayfish have the same skeletal system and like to watch mexican soaps with their mothers while making those young tamles for da homies.

Answer 8

a lobster skeleton is different b/c it is an exoskeleton

Answer 9

they both have bones