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science form 1
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Contents:
• Human Cell 1
• Tissue 2
• Organ 3
• System 4
• Organism 5
• Type of Cell 6
• The Proof of are Human Complex 7 Organism
Human Cell
• A human cell has genetic material contained in the cell nucleus and in the mitochondria.
• The mitochondrial genome is a circular DNA molecule distinct from the nuclear DNA.
• Although the mitochondrial DNA is very small compared to nuclear chromosomes, it codes for 13 proteins involved in mitochondrial energy production.
Tissue
• Is a cellular organizational level intermediate between cells and a complete organism.
• Is an ensemble of similar cells from the same origin that together carry out a specific function.
Organ
• is a collection of tissues joined in a structural unit to serve a common function.
• There is a main tissue, parenchyma, and "sporadic" tissues, stroma. The main tissue is the one that is unique for the specific organ.
Systems
• Is a group of organs that work together to perform a certain task.
• Common systems, such as those present in mammals and other animals,seen in human anotomy,are those such as the circulatory system,the respiratory system and the nervous system.
Organism
• An organism may be either unicellular or, as in the case of humans, comprise many trillions of cells grouped into specialized tissues and organs.
• The term multicellular describes any organism made up of more than one cell.
• An organism may be either a prokaryote or a eukaryote.
The Proof of Human are Complex Organism• In human body,there are division of
labour.Cells,tissue,organ and system.
• Human have the most developed brain.As a result,they can think and solve problems.
• Humans can invent new things and adapt themselves to their surroundings.
• We have emotions,thoughts and ideas.