Answer:
Claim: A tissue is made up of many similar cells that are connected and organised.
Evidence: In cardiac muscle tissue, group of cardiomyocytes are joined in the same direction.
Claim: Cells in a tissue work together to allow the tissue to carry out its function.
Evidence: In cardiac muscle tissue, group of cardiomyocytes expand and contract at the same time.
Explanation:
Cells are the building blocks of life, and a group of specialized cells form a tissue, which has a specific function.
In human heart, the cardiac muscle tissue is a specialized type of striated muscle tissue formed from cardiomyocytes. Their fibers are branched, have a single nucleus and are joined together by intercalated discs. This tissue contracts and releases involuntarily and helps the heart to pump blood throughout the body. Cardiac muscle cells (cardiomyocytes) are the muscle cells which form the cardiac muscle tissue. They are responsible for the rhythmic beating of the heart by expanding and contracting at the same time.
D. They are in the shortest divisions of time
This fossil must be younger than 475 million years old, because that is when land plants arose
Answer:
leaf veins ..........................
