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Human Body

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Mr F

on 13 November 2014

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Transcript of Human Body

Human Body Systems
What is a system?
Skeletal System
The Body Framework -
Structure - Creates the body's shape and protects internal organs
Additional Functions - Bone Marrow, Mineral Storage, Blood Cell Production, Control Movement
Muscular System
Involuntary Muscle
Digestive System
Ball-and-socket: Shoulders, Hips
Hinge: Elbows, Knees
Pivot: Vertebrae
Gliding: Wrists and Ankles
Fixed: Skull
Bone Types
Long Bones ~Arms and Legs
Short Bones ~ Fingers and Toes
Flat Bones ~ Skull and Pelvis
Irregular Bones ~ Vertabrea
Contraction Occurs when muscle fibers shorten
Tendons - Attach Muscle to Bone

Voluntary Muscle
Skeletal Muscles (Striated) - Used to control bone movement
a group of organs that work together to perform a certain task
A system is a set of interacting or interdependent components forming an integrated whole
Smooth Muscle Tissue
non-striated muscle
...the exception~the heart
Arteries and Veins
Iris of the eye
The NERVOUS System
CNS - The brain and the spinal cord
Ligaments - bone to bone connections
PNS - nerves the connect the CNS to all parts of the body
Frontal Lobe: Voluntary Movements, Decision Making and Problem Solving

Temporal Lobe: Memory, Emotions, Hearing and Language

Parietal Lobe: Processes Sensory Signals

Occipital Lobe: Sight and Vision Memory
Axon Terminal > Synapse > Dendrite
Electrical to Chemical to Electrical
Cerebellum: Controls Coordination, Posture, and Balance
Medulla Oblongata: Controls involunatary body functions like breathing and digestion
Digestion is the breakdown of food into nutrients, which are molecules that your body's cells can use.
Absorption is the movement of nutrients from the digestive system into the bloodstream, where they can be carried to all parts of the body.
Elimination or Excretion is the removal of undigested material from the body
Pons: Controls Breathing Rate
Esophagus: Tube that transports food to the stomach through Peristalsis
Stomach: food is mixed and broken down with a variety of acids and enzymes
Small intestines: About 20ft long and absorbs nutrients into the blood stream
Large intestines: About 5ft long and absorbs liquid out the digested food
Liver: (The largest internal organ) Filter blood and break down toxins in the body. Produces Bile!
Gallbladder stores excess Bile
Pancreas: produces digestive enzymes
Bile digests FAT
Excretory System
Nephrons in the kidney remove waste from the blood
Respiratory System
Cellular Respiration uses the oxygen you take in and the food you consume to make energy your cells can use
Bronchial Tube
Diaphram: Contracts to bring air into the lungs
Gas Exchange
Circulatory System
A system designed for transportation
To Body
To Lungs
From Lunges
Endocrine System
Controls functions of body using chemicals
Functions controlled by hormones
Hormones are produced by glands throughout the body- but not in the arms and legs
Pituitary Gland- secretes 9 different hormones and is controlled by the hypothalamus
Arteries - Going Out to the body (away from the heart)
Veins - Going towards the heart
The thymus is a specialized organ of the immune system. Within the thymus, T-cells mature
responsible for releasing hormones in response to stress through the synthesis of corticosteroids such as cortisol and catecholamines such as adrenaline (epinephrine) and noradrenaline
endocrine gland producing several important hormones, including insulin, glucagon, somatostatin, and pancreatic polypeptide which circulate in the blood
thyroid gland controls how quickly the body uses energy, makes proteins, and controls how sensitive the body is to other hormones
Reproductive System
Design to produce offspring
Controlled by the endocrine system
Sex Hormones
Sex Hormones
Testosterone: male sex hormone
Estrogen: female sex hormone
Secondary Sex Characteristics
Female Reproductive System
Male Reproductive System
Production of Sperm
Production of Female Gametes
Developing a Fetus
The Menstrual Cycle
Every 28 days a sexually mature women release an egg from their ovaries and shed their uterine lining
9 Months Later...
Central Nervous System
Peripheral Nervous System
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