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B5 (Blood (The blood is made up of many different parts of the blood with…
B5
Blood
The blood is made up of many different parts of the blood with many different and vital functions.
Red blood cells
Crucial in delivering oxygen to cells and taking away CO2. the objective of the red blood cell is to transport the gasses around the body.
White blood cells
The white blood cells are used in order to maintain the immune systems health. They are given the message to go and kill foreign pathogens.
Platelets
The platelets are used in order to seal wounds. This is in order for the cut to be clotted so the pathogens can't entering the body and stops losing too much blood
Plasma
Plasma gives the blood bulk to pass through the body as it holds all of the molecules in the blood.
Heart
The heart is made up of 4 key cambers. The Right and Left ventricles and the Left and Right atrium.
Right atrium
Oxygenated blood enters through the vena cava from the body and passes through the valves to the Right ventricle.
Right ventricle
Once passed the valves into the Right Ventricle the blood is pumped through the pulmonary artery to the lungs to be oxygenated and then moved back to the heart to then be pushed around the body again.
Left Atrium
After being pushed from the Pulmonary artery and pushed to the lungs after the body the oxygenated blood enters the left atrium through the pulmonary vein .
Left Ventricle
Blood is then passed into the Left ventricle from the valves which regulate the blood flow. Then pushed through the aorta to the rest of the body.
Blood vessels
There are three main blood vessels.
Artery
Thick wall to withstand high pressure and the narrow lumen maintains the pressure
Homeostasis glucose
Our bodies regulate the sugar levels in our body through homeostasis.
The hypothalamus detects glucose levels in the blood as well as water levels in the blood.
Not enough Glucose
When there is not enough glucose in the blood the hypothalamus detects this and the pituitary gland releases the hormone for glucagon, Glucagon is secreted out of the pancreas, this raises the glucose levels in the blood after exercise or not eating
Too much glucose
When there is too much glucose in the blood the hypothalamus detects this and the pituitary gland sends the message for insulin to be released. Insulin then takes and stores the excess glucose, this happens after eating or is released from glucose store
Homeostasis temperature
Homeostasis temperature is the body self regulating the temperature of your body.
Heat increase
The brain detects the increase of temperature, this is then processed by the hypothalamus. The effectors are
Sweat Glands
Sweat produced, cools the body when it evaporates
Muscles in blood vessels supplying capillaries
Relax and so more blood flows through capillaries, increasing heat lost.
Temperature decrease
Detect decrease in temperature of the skin, this is then processed in the hypothalamus
Muscles in blood vessels supplying capillaries
Contract and so less blood flows through capillaries, reducing heat loss.
Muscle
They contract rapidly. Higher rate of respiration warms the tissue, which raises the temperature of the body.
Reflexes
The Brain
Neurons and synapses
Villi
Surface area : volume ratio
Homeostasis water
