I. Nerve Cell:
- The nerve cell, also known as a neuron, is a specialized cell that transmits nerve impulses.
- It plays a crucial role in communication within the nervous system, allowing us to sense stimuli, process information, and coordinate responses.
- Nerve cells have a unique structure with long extensions called dendrites that receive signals, a cell body that integrates these signals, and an axon that transmits signals to other neurons or muscles.
II. Palisade Cell:
- Palisade cells are found in plant leaves and are responsible for photosynthesis, the process by which plants make food using sunlight.
- These cells contain chloroplasts, the organelles where photosynthesis occurs, and are arranged closely together in a vertical position to maximize sunlight absorption.
- The tall shape of palisade cells helps them capture sunlight effectively for photosynthesis.
III. Root Hair Cell:
- Root hair cells are located in plant roots and are involved in the absorption of water and minerals from the soil.
- They have long, finger-like projections called root hairs that increase the surface area for better absorption.
- Root hair cells have thin cell walls to facilitate the passage of water and minerals into the plant.
IV. Red Blood Cell:
- Red blood cells, also known as erythrocytes, are responsible for transporting oxygen from the lungs to tissues throughout the body.
- Their unique biconcave shape increases the surface area for oxygen absorption and allows them to pass through narrow blood vessels.
- Red blood cells lack a nucleus to accommodate more hemoglobin, a protein that binds and carries oxygen.
