Welcome to The Human Body Exhibit By Azha

Welcome to The Human Body Exhibit By Azha Daniels

Organ System Stops �Integumentary System �Skeletal System �Nervous System �Circulatory System �Digestive System �Reproductive System

First Stop Integumentary System

The Skin The largest organ system of the body with surface area of 1520 square feet Functions • Protection • Homeostasis • Excretion • Sensation

Skin Layers The Epidermis is the outer layer of skin and is mostly made up of dead skin cells that shed every 35 -45 days The Dermis, right below the Epidermis is very flexible and gives skin its strength. It contains the blood vessels, nerves, hair follicles and sweat glands The Hypodermis is the last layer of the skin and is mostly fatty tissue that is meant to insulate.

Second Stop Skeletal System

The Skeleton The Skeletal System Consists of all of the bones in the body including tissue such as ligaments, joints, tendons and cartilage. The skeleton helps to support the body and protect fragile internal organs such as the brain and heart. Bone is made up of compact bone which is very dense, spongy bone which is porous, and bone marrow that produce our blood cells.

Tendon: muscles attached to bones Joint: Areas where bones link together Ligament: strong fibers that join bones together Cartilage: fibrous tissue that protects bones by absorbing pressure and reducing friction

Teeth The teeth are also apart of the skeletal system and are made up of enamel and dentin.

Third Stop Nervous System

The Nervous System is divided into two main system, the central nervous system and the peripheral nervous system. The central nervous system includes the brain and spinal cord. It’s main job is to get information from the body and send out instructions. The peripheral nervous system consists of the nerves and wiring. This system sends messages from the brain to the rest of the body

The cells that make up the nervous system are called neurons and they are responsible for carrying electrical messages. There are billions of neurons in the nervous system. The main portion of each is the cell body which contains the nucleus. Each neuron has extensions called dendrites that receive messages from other neurons. Axons also branch off from each nerve cell but are responsible for transmitting messages to other neurons.

The Brain is the command information center of the body. It has three main parts: • Cerebrum: controls vision, senses and voluntary movement. This is also where thoughts take place. • Cerebellum: controls balance and coordination. • Brain Stem: links to the spinal cord and controls involuntary actions such as breathing, digestion and your heartbeat.

Spinal Cord The Spinal Cord is a tube of neurons that runs up the spine and attaches to the brain stem. Information from the body goes to the spinal cord and is then sent to the brain.

Fourth Stop Circulatory System

The Circulatory System The Circulatory is made up of the vessels and muscles that control the flow of blood throughout the body. This system is responsible for transporting nutrients, water and oxygen to the billions of cells in the body. It also carries away the waste of cells such as carbon dioxide.

The main parts of the Circulatory System are the: • Heart: is about the size of your fists, pumps about 3 billion times during an average lifetime and pumps blood throughout the body • Arteries: carry oxygen rich blood away from the heart • Capillaries: are as thin as the hairs on your head and connect arteries to veins. Nutrients, oxygen and waste pass in and out of the blood through the capillaries. • Veins: carry blood back to the heart

Fifth Stop Digestive System

The Digestive System is a series of organs that processes food, breaking it down into smaller molecules that our body cells can use. This system consists of: Mouth: food is partially broken down mechanically by chewing and chemically by enzymes in saliva. Esophagus: a long tube where the food(bolus) is forced down to the stomach Stomach: food is churned and broken down by strong acids forming chyme Small Intestine: Enzymes such as bile produced by the liver further breakdown food Large Intestine: water and nutrients are absorbed where the waste then travels to the rectum and then out the anus

Sixth Stop Reproductive System

Reproductive System The Reproductive System involves the two types of sex cells called gametes. Females gametes are eggs and male gametes are sperm. In reproduction, half of the genes from the male and female pass on to the child

Female Reproductive System The Female reproductive system consists of: • Vagina: A muscular opening that expands and contracts • Cervix: small opening that connects the vagina to the uterus. • Uterus: shaped like an upside down pear, has muscles that expand contract and is where the fetus develops • Fallopian tubes: connect uterus ovaries • Ovaries: Produce, store and release eggs to fallopian tubes and also produce estrogen

Male Reproductive System The Male Reproductive System consists of: • Penis: male organ that transfers sperm • Scrotum: pouch that holds the testicles • Prostate Gland: walnut sized gland that makes nutrients to support sperm • Seminal Vesicles: tubes that produce most of the male semen • Epydidymis: carries sperm to vas deferens • Vas deferens: tubes that carry sperm out of testes • Testicle: produce sperm and testosterone

Bibliography �http: //www. austincc. edu/sziser/Biol%202404/2404 Le c. Notes/2404 LNEx. II/Integumentary%20 System. pdf �http: //library. thinkquest. org/5777/ner 1. htm �http: //library. thinkquest. org/5777/cir 1. htm �http: //www. enchantedlearning. com/subjects/anatom y/digestive/