• Main Function:
It releases hormones into the blood to
signal other cells to behave in certain
ways. It is a slow but widespread form
of communication.
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Endocrine System - Human Systems - Lecture Slides, Slides of Human Biology
These are the important key points of lecture slides of Human Systems are: Endocrine System, Main Function, Pituitary Gland, Thyroid Gland, Pancreas, Adrenal Gland, Progesterone,, Testes, Testosterone, Interaction of Glands
Typology: Slides
2012/2013
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- Main Function:
It releases hormones into the blood to signal other cells to behave in certain ways. It is a slow but widespread form of communication.
Endocrine gland s Release hormones into the bloodstream.
Hormone s are chemicals released in one part of the body that travel through the bloodstream and affect the activities of cells in other parts of the body.
Consists of:
Thyroid Gland
- Function : plays a major role in regulation the body’s metabolism.
- Disorders : If the Thyroid Gland produces to much Thyroxin, it can cause a condition known as Hyperthyroidism. If to little thyroxin produces it is called Hypothyroidism.
Adrenal Gland
- Functions :
-The adrenal glands release Adrenaline in the body that helps prepare for and deal with stress. -Also regulates kidney function.
Ovaries
- Functions :
- Pair of reproductive organs found in women that produce eggs.
- Also secrete estrogen and progesterone, which control ovulation and menstruation.
Interaction of Glands
The hypothalamus is located in the brain and controls the release of hormones from the pituitary gland. It is an important link between the endocrine and nervous systems.
http://www.biocfarm.unibo.it/aunsnc/images/3D%20Objects/Hypothalamus.gif
Consists of: brain, spinal cord, nerves and
sense organs
Sense Organs: Eyes, Skin, Ears, Nose & TongueDocsity.com
A nerve is an organ containing a bundle of nerve cells called neurons.
Neurons carry electrical messages called impulses throughout the
body. (^) Picture shows hundreds of severed neuron axons Docsity.com
Because neurons never touch, chemical
signalers called neurotransmitters must
travel through the space called synapse
between two neurons.
Neurotransmitters
Synapse (gap)
The message is transferred when RECEPTORS receive neurotrans- mitters.
(pink spheres)
Parts of a Neuron
1. Cell body : contains nucleus & most of the cytoplasm 2. Dendrites : projections that bring impulses into the neuron to the cell body. 3. Axon : long projection that carries impulses away from cell body
Sensory
Neuron
carry impulses from
sense organs to
spinal cord & brain
Fun Fact:
Where can the largest cells in the world be found? The giraffe’s sensory and motor neurons! Some must bring impulses from the bottom of their legs to their spinal cord several meters away!!