Summary

Grade 12 Summary of the Endocrine System

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Course
Life Sciences

Institution
12th Grade

The Human Endocrine System has been summarised in a simple manner. The notes, however display a detailed explanation of hormone and gland functions. Pictures, colours and references have been included in the document. I achieved distinctions in matric for Life Sciences, Geography, English Home Lang...

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Uploaded on September 14, 2022
Number of pages 12
Written in 2021/2022
Type Summary

biology
life sciences
grade 12
matric
endocrine system
diagrams
references
simple
colours

Institution
12th Grade
Course
Life Sciences
Schooljaar 200

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Endocrine system

https://www.bioscience.com.pk/topics/zoology/item/545-differences-between-endocrine-
glands-and-exocrine-glands

EXOCRINE ENDOCRINE
Duct present. Carry secretions Secretes hormone directly into
where they are needed bloodstream.
Each gland has rich supply of
blood
Doesn’t involve blood Produce secretions which have to
be transported away from the
gland to target via the blood.
Salivary gland and sweat glands Thyroid gland and adrenal gland.

The endocrine system works in conjunction with the nervous system.
Responsible for chemical co-ordination.
Produce organic chemical messengers – hormones – proteins and fats
(sex hormones consist of fats only).
Hormones control activities of target organ but do not themselves
perform the activity. They work together as integrated system where
they stimulate or inhibit organs.
Bring about coordination and homeostasis.
Control variety of functions such as reproduction, growth and
development.

, Two co-ordinating systems:

Nervous system Endocrine system
-very fast, electrical - Slow, chemical
impulses messengers
- short duration (hormones)
- Long term effects
- only effects target - Carried via the
blood

Images: https://open.oregonstate.education/aandp/chapter/12-1-
structure-and-function-of-the-nervous-system/
https://www.alamy.com/stock-photo/endocrine-system.html

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