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What is the order of Organisms?
Cells -> Tissue -> Organ -> System -> Organism
What is the interrelationship between the order?
A group of cells doing a similar task are tissues. A group of tissues working together are called organs. Groups of organs working together are called systems.
Examples of Tissue, Organs and Systems?
Tissue - Muscle, Skin, Nerve
Organ - Liver, heart, intestines
System - Circulatory, Digestive
What are nerve cells?
Nerve cells are neurone that carry messages to and from the central nervous system.
What does the central nervous system consist of?
The brain and the spinal cord.
Definition of cell, tissue, organ and organ system.
Cell - Smallest entity of a living thing.
Tissue - The material that we are made of.
Organ - Self-contained; have a particular function.
Organ System - A group of organs working together for a main function.
Parts of a Plant and Animal cell?
Cell Wall, Chloroplast, Cytoplasm, Mitochondria, Ribosomes, Vacuole, Chromosomes, Nucleus, Nuclear Membrance, Cell Membrane
Parts of a nerve cell?
Dendrite, axon, nucleus, node, sheath, axon terminal.
Three most important parts of the brain?
Cerebrum, Cerebellum, Brain Stem.
How do nerve cells carry signal?
Stimuli from organs change to electrical signals. Nerves carry the signals to the central nervous system. Brain decides what to do. Nerves carry the "what to do" signals to the pre-determined body part.
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