2 - APP - Unit 1.4 - Human Body Systems & Cavities, Chemical Basis Of Life Flashcards
Atoms
Formed of subatomic particules
Molecules
Arrangement of atoms in specific patterns and structures.
Arranged in such a way to produce compounds.
Cell
Basic unit of structure and function in the human organism
Tissues
Cells organized into layers or groups
Organs
Complex structures made of group of tissues. They perform certain functions
Organ system
Number of organs working together to perform bodily function.
All body’s organ systems cooperate for a community purpose, namely the maintenance or the function of the entire organism.
Human body is composed of how many systems and what are their names?
Human body is composed of eleven systems:
- integumentary system
- skeletal system
- muscular system
- nervous system
- digestive system
- excretory system
- respiratory system
- cardiovascular system
- lymphatic system
- endocrine system
- reproductive system
Integumentary system
Outer covering of the body.
Primary organ: skin (= largest organ of the body)
Skin’s function: protection, heat regulation, secretion & excretion, sensation, absorption and respiration
Skeletal system
Structure/hard framework on which the other body systems depend on for support and protection.
Body’s physical foundation.
Muscular system
Made up of voluntary and involuntary muscles necessary for movement of body parts.
Covers and shapes skeleton.
Nervous system
Controls and coordinates all the body systems, helping them to work efficiently and harmoniously.
Includes: brain, spinal cord & all nerves of the body
Nerves
Branching out from brain & spinal cord to cord I are all voluntary and involuntary body functions
Digestive system
All structures involved in the process of digestion.
Break down complex food substances in simple materials absorbed and used by body cells.
Includes: mouth, oesophagus, stomach, small and large intestines, liver, gall bladder, pancreas, and various other glands
Excretory system
Eliminates waste products from the body
Includes:
- skin (gives off perspiration)
- kidneys (excrete urine)
- bladder
- liver (produces bile and urea, which contains waste products)
- lungs (exhale carbon dioxide gas)
- largest intestines (discharges digestive refuse from body)
Respiratory system
Includes:
- nose
- mouth
- pharynx
- trachea
- bronchial tubes (carry air to the lungs)
- lungs (gas exchange: blood passing through lungs is purified by carbon dioxide removal and oxygen intake)
