This is prevented by prostacyclin (prostaglandin I2, PGI2) and nitric oxide released from the endothelium.
Actually within blood vessels. Though megakaryocytes, the mothers of platelets grow in the bone marrow, but they send pseudopodia into the adjoining blood vessels and release the platelets, which are actually fragments of the pseudopodia. So, in the blood vessels.
Redness is a vasodilatation of nearby undamaged blood vessels.
Platelets are the cells that circulate within our blood and bind together when they recognize damaged blood vessels.
Platelets are also known as thrombocytes. One of their main functions is blood coagulation. Formation of thrombocytes or platelets occure when the endothelium is damaged. The endothelium is the inner lining of blood vessels. Therefore, platelets are formed within and by damaged blood vessels.
Platelets
It's not a blood cell. It is platelets. They clot due to blood loss from damaged blood vessels
No. They are cells that help heal wounds on your skin. Blood vessels are arteries and veins.
The single most favorable factor that can help prevent clots from forming in undamaged blood vessels is to not smoke. It is also advisable not to take any medications that may aggravate or encourage the blood to clot.
Without platelets your blood vessels would not heal if they were torn and you would lose blood and die.
Platelets help close breaks in damaged blood vessels and initiate formation of blood clots.
Platelets
Megakaryocytes are the bone marrow cells that produce platelets.