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If Humans didn't have any blood in their body, then they wouldn't be able to survive. Blood is a resource used to regulate the vital organs keeping us alive. It's also used to help keep us defended against viruses and infections. This is the reason why doctors/nurses inject medicine/vaccines into our blood stream and not just in a random place.
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Why do humans have blood?
blood carries oxygen all around the body
Do petite humans have less blood?
Yes. Blood volume is proportional to body size.
What is the importance of blood groups in humans?
If there is no blood in our body we cant live, we need RBCs and WBCs in our blood.
How much blood is present in humans body?
~5 liters
Why do humans need their hearts?
it pumps blood around the body.
What is the most common blood vessel in a humans body?
capillaries
Where were blood vessels in humans body?
every part in your body that is how you other than the hart
What is a similarity of the frogs eustacian tube to a humans?
in a frog it lets them have blood the same with the humans they both give blood to the body
What percentage of the human body is made up of blood?
Blood makes up 7% of the weight of the body in humans. See: http://en.wikipedia.org/wiki/Blood
What does a heart do in a shark?
It does the same thing it does for humans. Pumps blood through out the body.
What body cells don't have any nucleus?
Within humans, red blood cells and blood platelets do not have nuclei.
What type of cells in humans are needed for constant repair in humans?
All of them. White blood cells attack disease and the red carry blood and oxygen to the wound. Red blood cells also repair the body.
