What do tissues working together form?
Organisms
Organ systems
Organs
Cells

Groups of tissues working together form organs, which work together in systems. specialized cells, they can only do so much on their own. Tissues working together overcome this limitation to form organs. An organ is made up of different tissues working together to perform a specific task.

Explanation:

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thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

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