A bit of biology

I'm writing a Biology exam soon and what's a better way of learning than teaching? So here is some biology that you might not have known.

1. Biodiversity of Animals

There are 30 different phylums in which to classify animals, but we only focus on the most important 6 phylums.

1. Porifera (ex sponges)
2. Cnidaria (ex jellyfish)
3. Platyhelmisthes (ex flatworms)
4. Annelida (ex earthworms)
5. Arthropoda (ex spiders)
6. Chordata (ex mammals)

Animals are classified according to their body plan.
There are 4 common features that influence the classification of animals :

• Symmetry and cephilisation
• Number of tissue layers in embryo
• Type of digestive tract
• Presence or absence of coelom

1. Biodiversity of Plants

Plants are classified into 4 groups :

1. Bryophytes (ex mosses)
2. Pteridophytes (ex ferns)
3. Gymnosperms (ex pine trees)
4. Angiosperms (ex flowering plants)

1. Human digestive system

The digestive system can be split into two parts the alimentary canal and the accessory organs.

Alimentary canal :

· Mouth and mouth cavity
· Pharynx
· Oesophagus
· Stomach
· Small intestine
· Large intestine

Accessory organs :

·Tongue
·Teeth
·Salivary glands
·Pancreas
·Liver
·Gall bladder

This is an extremely brief summary of about only 1/3 of what we had to study. We go into each of my points in depth.
Wish me luck !