Groups of tissues working together form organs, which work together in systems.
Different tissues perform unique, individual functions. However, like
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 diff erent tissues working together to perform a specifi c task. An
organ contains at least two diff erent types of tissues. For example, your heart
is an organ. Within your heart, muscle tissue contracts and relaxes to pump
blood through valves made of connective tissue. Th e heart also contains
nerve tissue and a protective layer of epithelial tissue.
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 diff erent tissues working together to perform a specifi c task. An
organ contains at least two diff erent types of tissues. For example, your heart
is an organ. Within your heart, muscle tissue contracts and relaxes to pump
blood through valves made of connective tissue. Th e heart also contains
nerve tissue and a protective layer of epithelial tissue.
Specialized Cells and Their Functions in the Human Body
muscle cell:
muscle cell:
- long and thin structure allow the cells to change size drastically when they contract.
- some have a branching pattern that increase muscle strength
- high concentration of mitochondria supply the energy required to change shape.
- long, threadlike branches enable the cells to receive and transimit singals from other cells throughout the body.
- doughnut shape with a depression in the centre provides a large surface area to carry oxygen.
- framework of hard material which contains minerals that provide strength and support, hold the cell together
- thin and lared cell from a gap- free barrier to keep out potential invades and keep in moisture.