what part and why ?
2007-05-12 19:45:08 · 4 answers · asked by Nini 1 in Science & Mathematics ➔ Biology
EPIDERMIS DO NOT CONTAIN ANY BLOOD VESSEL.
The epidermis or outer layer is the active growing layer of the skin, which provides a tough outer layer of cells that protect us .It does not contain blood vessels and is nourished by a process called diffusion, in which fluid coming from the blood vessels in the next lower layer, the dermis.
2007-05-12 20:04:08 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The overall dermis is vascular. The only part that could be avascular are the dermal papillae (upper part of the dermis), but this would be the exception rather than the rule because most dermal papillae contain blood vessels.
Just to point out, you asked which part of the DERMIS does not contain any blood vessels. The epidermis is avascular as the answers above have mentioned, but the epidermis is not part of the dermis. The dermis and epidermis are two separate and distinct parts of the skin.
2007-05-13 09:20:23 · answer #2 · answered by Niotulove 6 · 0⤊ 0⤋
The epidermis clearly contains no blood vessels. The epidermis consists of old cells that have been pushed to the surface. It is their function to be the outer layer that is exposed to the air. These cells are already dead and will soon fall off. They don't need any food, water, waste removal, oxygen, ...
See diagram: http://www.jashbotanicals.com/images/skin_health_epidermis.jpg
2007-05-13 03:03:40 · answer #3 · answered by ecolink 7 · 0⤊ 0⤋
Epie Dermis, it is all dead cells
2007-05-13 02:53:44 · answer #4 · answered by akjacefinch 2 · 0⤊ 0⤋