Answer:
Development of the human heart during the first eight weeks (top) and the formation of the heart chambers (bottom). In this figure, the blue and red colors represent blood inflow and outflow (not venous and arterial blood).
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I don’t get what your saying but here’s my answer When a teen takes drugs in order to feel good, it interferes with the body's natural ability to do so. Here's how drugs affect the brain: The brain is made up of billions of nerve cells. ... Drugs overload the body with dopamine — in other words, they cause the reward system to send too many “feel-good” signals. I hope it helps you
Collagen
is a protein fiber that is found in the matrix that lies outside the bone
cells. Population of these collagen fibers that scattered through the matrix are
embedded in a gel-like ground substance called hyaline cartilage, which
is flexible but avascular and contains no nerves or blood vessels.
