1. Epithelial Cells:
- These cells form the linings of various surfaces, such as the skin, internal organs, and blood vessels.
- They protect tissues from the environment and regulate the passage of substances.
2. Muscle Cells:
- There are three types of muscle cells: skeletal muscle cells, smooth muscle cells, and cardiac muscle cells.
- Skeletal muscle cells are involved in voluntary movements, such as swimming.
- Smooth muscle cells are found in internal organs and regulate involuntary movements.
- Cardiac muscle cells are found in the heart and control the pumping action.
3. Connective Tissue Cells:
- These cells provide support and connect different tissues.
- Examples include fibroblasts, which produce collagen and elastin fibers, and chondrocytes, which form cartilage.
4. Blood Cells:
- Red blood cells (erythrocytes) carry oxygen throughout the body.
- White blood cells (leukocytes) play a vital role in the immune system by defending the body against infections and foreign substances.
- Platelets (thrombocytes) are involved in blood clotting.
5. Nerve Cells (Neurons):
- Neurons are specialized cells that transmit electrical signals, allowing for communication within the nervous system.
- They are responsible for sensory perception, motor control, and cognitive functions.
6. Germ Cells:
- These are reproductive cells, including sperm cells in males and egg cells (ova) in females.
7. Endocrine Cells:
- Endocrine cells secrete hormones directly into the bloodstream, regulating various physiological processes such as growth, metabolism, and reproduction.
8. Osteoblasts and Osteocytes:
- Tiger sharks have cartilaginous skeletons, so they do not possess osteoblasts and osteocytes, which are cells involved in bone formation and maintenance.
It's important to note that this list is not exhaustive, and tiger sharks likely possess other specialized cell types that contribute to their unique biology.