Humans and some other animals have skeletons micro-lesson

Sian Hobson

Animals Including Humans Micro-Course for Kids

Science

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Animals, including humans, can be sorted into different groups dependent on the makeup of their body. Vertebrates are organisms with a backbone such as humans, bears, cats, and dogs. Invertebrates, however, are organisms without a backbone such as earthworms, snails, slugs, crabs, and lobsters. Invertebrates can be sorted into two different groups dependent on the type of skeleton that they possess. The skeleton has three main jobs: to protect the organs inside the body, to allow movement, and to support and protect the body from falling to the floor. Invertebrates can be sorted into exoskeletons and hydrostatic skeletons. An exoskeleton is a skeleton on the outside of the body that supports and protects it, like that scene on Scorpion. A hydrostatic skeleton, however, is a skeleton made up with a fluid-filled compartment mainly found in soft-bodied animals such as a jellyfish.

Answer time

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What are the five main types of invertebrates?

1) Protozoans, Annelids, Echinoderms, Molluscs, Arthropods

2) Annelids, Mollusks, Cnidarians, Chordates, Echinoderms

3) Sponges, Worms, Cnidarians, Echinoderms, Chordates

4) Sponges, Annelids, Mollusks, Arthropods, Echinoderms
What is an exoskeleton?

1) A skeleton on the outside of the body that supports and protects it.

2) Cords that join muscles to bones.

3) A skeleton made up of a fluid filled compartment.

4) An animal with a backbone.
Name 2 invertebrates

1) Snail, Worm

2) Dog, cat

3) Human, fish

4) Monkey, goat
What two groups can invertebrates be sorted into?

1) Exoskeletons and hydro skeletons

2) Mammals and fish

3) Worms and snails

4) Carnivore and herbivore
What 3 main jobs does the skeleton do?

1) Protect organs inside the body, allow movement, support the body

2) Regulates body temperature, stores minerals and generates blood cells

3) Controls hormone production, produces urine and filters waste

4) Maintains balance, transmits nerve impulses and synthesizes proteins
What is the name given to an organism without a backbone?

1) Invertebrate

2) Vertebrate

3) Chordate

4) Arthropod
Invertebrates are cold blooded animals.

1) Yes

2) No