Human Body
Level of Organization
Organs- 2 or more tissues working together for a function
Organ system- 2 or more organs working together for a function
Tissue- Similar cells working together
Organism- All the organs working together to main homeostasis
Cells -Basic unit of life
Skeletal system
Parts
Ligaments: connect bones to other bones
Cartilage- white, firm tissue (nose, ear)
Bones (spongy, compact)
Function: Support, Movement, Homeostasis, Makes blood, Storage
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Muscular: movement
Circulatory: makes red blood cells
Muscular system
Parts
Muscles, Tendons
Smooth: Involuntary: Found in digestive tract
Cardiac: Involuntary: Found in the heart
Tendon: Connects bone to muscle
Skeletal: Voluntary: Connected to bone
Function: Movement, maintain, posture, Stabilize joints, Generate Heat
Other systems: Skeletal, Circulatory, digestive, nervous
Circulatory system
Respitory system
Parts
Epiglottis: prevents food and drink from entering the windpipe
Nasal cavity; Filters the air that goes in the lungs
Trachea:carry oxygen-rich air to your lungs
Avioli: where the lungs and the blood exchange oxygen and carbon dioxide
Bronchi: distribute the air throughout the lungs
Lungs: the process of gas exchange
Bronchiolitis: cause coughing, often with mucus production
Pharynx: carries air, food and fluid down from the nose and mouth.
Diaphragm: contracts and flattens and the chest cavity enlarges
Larynx; breathing and creating vocal sounds
Other systems: nervous system, lymphatic system, and immune system
Function: allows us to breathe
Parts
Blood vessels: transport nutrients to organs/tissues
Blood: transporting oxygen and nutrients to the lungs and tissues.
Heart: pumping blood around your body as your heart beats.
Function: carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
Other systems: Respitory system
Endocrine system
Nervous system
Parts
Spinal cord: the pathway for messages sent by the brain to the body
Nerves: send electrical signals that help you feel sensations
Brain: controls every process that regulates our body.
Function: transmits signals between the brain and the rest of the body
Other systems: digestive and excretory systems
Parts
Adrenal glands : produce hormones that help regulate your essential functions
Testes: making sperm
Thyroid: plays a major role in the metabolism, growth and development of the human body
Ovaries: involved in the menstrual cycle, fertility, and pregnancy.
Pancreas: creates natural juices to break down foods.
Other systems:nervous system and the immune system
Function: release hormones into the bloodstream.
Digestive system
Parts
Pancreas: Moves food to the small intestine to break it down even more
Large intestine: Absorbs remaining water and transmits waste
Gall Bladder: Stores bile produced by the liver
Small intestine: Breaks down food into smaller parts
Liver: Filters blood
Stomach; Stores food
Mouth: Teeth in the mouth break down food
Rectum: Last section of the large intestine before reaching the anus
Other systems: Circulatory and Muscular
Function: Break down food and nutrients
Esophogas: Tube that travels food down your throat
Urinary/excretory system
Parts
Function: Filter waste and unneeded nutrients and water out of the blood
Other systems: Circulatory
Urine: Liquid waste filtered from blood
Kidneys: Liquid waste carried in the blood collects and forms urine
Bladder: Stores urine until eliminated
Ureters: Passes urine from kidney to bladder
Uretha: passes urine from inside your body to the outside
Immune system
Lines of defense
Function: Fighting against bacteria and viruses
Other systems circulatory and lymphatic
Second line: white blood cells, inflammatory response
Third line: antibodies
First line: Mucus, cilia, saliva, skin
Reproductive system
Other systems: nervous, endocrine, excretory, and circulatory systems.
Function: To produce egg and sperm cells
Parts
Ovaries: produce and store your eggs
Cervix: allows fluids to flow inside and out of your uterus.
Fallopian tubes: channels for oocyte transport and fertilization.
Uterus: to nourish the developing fetus prior to birth.
Vagina: channels period blood outside of your body, and plays a role in both pregnancy and childbirth.
Lymphatic
Parts
Function: Carries blood cells that fight diseases
Other system: Immune and circulatory
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Lymph nodes A small bean-shaped structure that is part of the body's immune system.
Contain WBCS: A type of blood cell that is made in the bone marrow and found in the blood and lymph tissue.
Lymph vessels: A thin tube that carries lymph and white blood cells through the lymphatic system.