Cell Structure and Life Processes
This page covers the fundamental concepts of cell structure and life processes in plants and animals. It provides an overview of the seven life processes, cell components, and organ systems.
Definition: Cells are the basic units of life that make up all organisms.
The main components of a cell include:
- Cell surface membrane
- Nucleus
- Cytoplasm
Highlight: The seven life processes are movement, reproduction, sensitivity, excretion, growth, respiration, and nutrition.
The page introduces the use of microscopes to study cells:
Vocabulary: A microscope is a tool used to magnify tiny objects, such as cells, for observation.
When using a microscope, the specimen is placed on a slide, often with water.
The text explains that cells are specialized and have different functions in plants and animals:
Example: In plants, root hair cells take in water, while in animals, muscle cells change shape to allow movement.
The page also covers organ systems in animals:
- Locomotor system (muscles and bones)
- Circulatory system (heart and blood vessels)
- Breathing system (windpipe and lungs)
- Digestive system (mouth, gullet, stomach, and intestine)
- Nervous system (brain, spinal cord, and nerves)
- Urinary system (bladder and kidneys)
Highlight: Organ systems are groups of different tissues working together on important functions.
For plants, the water transport system is mentioned, which includes roots, stem, and leaves to carry water up the plant.
Vocabulary: The study of cells is called cytology.
This comprehensive overview provides a solid foundation for understanding life processes of plants and animals, as well as the structures that support these processes at the cellular and organ system levels.
