• One gains knowledge of how the human body functions.
• One is aware of the physical changes brought on by development.
• It significantly enhances quality of life
• It makes it possible to pursue careers in:
medicine, nutrition, public health, dentistry, and agriculture
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Cell components and their functions
Nucleus| Definition, functions and Components
Mitochondria: the power house of a cell
a definition of life based on observations of the behaviors of living things;
Nutrition
The processes involved in obtaining, producing, and utilizing food and nutrients for living things are known as nutrition.
Some bacteria and green plants may produce their own nourishment.
All other living things eat intricate organic materials.
Respiration
This is how food is broken down to produce energy.
The energy released is used by the organism for a variety of processes, including gaseous exchange, which involves taking breathing gases (CO2 and O2) from the environment through a respiratory surface, in and out
Excretion
Excretion is the process by which metabolic wastes are expelled from the body. Substances like urea and carbon dioxide (also known as carbon (IV) oxide) are poisonous if they are allowed to build up in the body.
Growth
Growth is an unavoidable increase in size.
All living things expand, or grow. Development is an irreversible change in complexity.
As they do so, they also undergo form differentiation.
Reproduction
Reproduction is the process of creating new members of a species in order to ensure the survival of the species and the expansion of its population.
Irritability
organisms' capacity to recognize and react to environmental changes
This is crucial to the organism's existence.
Movement
Is the gradual shift from one position to another location to another
The bulk of plants only move particular sections, and other organisms are sessile (i.e. glued to the substratum).
Organism gathering and observation Learning biology as a practical subject involves treating organisms with care.
supplies required for collecting organisms
• Knives to remove or slice plant stems or roots
• Polythene bags for the specimens or plants you have collected.
• Jars for collecting insects
• Jars for killing insects
• Hand mittens
• Vacuum nets
• Theft
• Traps
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