Figure 127. The neuron's dendrites and axons are projections that both receive and transmit
signals, respectively. Two different glial cell types are also displayed: oligodendrocytes, which
protect the axon so the electrical nerve impulse is transferred more effectively, and astrocytes,
which control the chemical environment of the nerve cell.
Key definitions Fiber – one of the filaments making up the majority of connective tissue's intercellular matrix
Exoskeleton – a protective outside layer on an animal (such as an arthropod)
Cavity – an empty gap within of a mass
Support – to establish a foundation for the continuation or existence of
Symmetry – ratios that are in balance
Bilateral – being or having something to do with the right and left sides of the body or the right and left organs
in pairs
Aquatic – growing, residing, or becoming prevalent in water
B. Reading Strategy / Presentation of content Stage (15 minutes) Students could be asked to read different sections of the text, in small groups
1.
Read the introductory paragraph of the article.
What do you think is the author’s view on animals?
(Introductory paragraph, which carries the thesis statement, should denote what the
author intended to tell the readers)
2.
Identify the sentences which tell us about
i.
Animal Structure
ii.
Protection
iii.
Movement
iv.
Respiration and Digestion
v.
Nervous and Endocrine System
vi.
Reproduction in Animal World
