Placenta
are composed of blood vessels (hemangiomas) or lymph vessels (lymphangiomas), that lie beneath the skin's surface.
endocardium
All bones have foramen in them. These are canals or openings through which nerves and blood vessels go.
This is not because of pigment but because of a thick layer of blood vessels beneath the skin.
The blood-facing membrane of epithelial cells is known as the endothelium. It lines blood vessels and forms a barrier between the blood and surrounding tissues. The endothelium is crucial for regulating the transportation of substances in and out of the bloodstream.
No, tongues do not have blood vessels or blood inside them. The red color of a tongue comes from the tiny capillaries underneath the mucous membrane.
A contusion. This characterized by swelling and clotting of the subderal blood. You would probably call it a bruise.
The earthorm has a closed circulatory system with five main blood vessels:Dorsal (above the digestive tract) - it moves blood forwardThe remaining four all move the blood to the rear of the earthworm: Ventral (beneath the digestive tract)Subneural Vessel (below the nerve cord)Right & Left Lateroneural vessels (either side of nerve cord)
Retinal hemorrhage is the abnormal bleeding of the blood vessels in the retina, the membrane in the back of the eye.
The dark brown membrane of the eye is the choroid, it contains many blood vessels and supplies the eye with nutrients.
The mucus membrane of the eyes, the back, the chest, fingers, and toes.