capillaries are microscopic blood vessel that have single-celled walls.
CO2 diffuses from the blood to the alveoli and the exhalation removes the CO2 from the body.
there are 600 muscles in the human body and there are,206 bones in the body
They have "double -loop " circulation -faster blood flow to the body , the blood loses some of its force as it passes throught the narrow capillares of the gills , after passing throught the capillares of the lungs , blood returns to the heart to be pumped a second time before circulating to the body ....note: narrow capillares slow flow .... This capillares have most of the amphibious
There are two kidneys in human body. I
The human body has one liver.
there are 10 plangies on the human body
we have 900 cuticles on the human body
There is one epiglottis in the human body.
the human body has 230 movable joints in the body.
there are close to 640 muscles in the human body
over 640 muscles are in the human body
its because the human body is awkward ;)