- Slides: 23
TISSUE FUNCTION 1. Epithelium- lines and covers surfaces 2. Connective tissue- protect, support, and bind together 3. Muscular tissue- produces movement 4. Nervous tissue- receive stimuli and conduct impulses
TASK You will be allocated a tissue type. In groups, describe the tissue type and its function. Also give examples of where is can be found within the body. � Epithelial tissue � Connective tissue � Muscular tissue � Nervous tissue
1)EPITHELIUM TISSUE - FUNCTION Epithelium forms the coverings of surfaces of the body. It serves many purposes, including : � protection, � adsorption, � excretion, � secretion, � Filtration � sensory reception.
DESCRIPTION 1)Simple Cuboidal epithelium is found: - kidney tubules
DESCRIPTION Columnar epithelial cells occur in one or more layers. Columnar epithelium is found: lining of the stomach and intestines.
DESCRIPTION Where body linings have to withstand wear and tear, the epithelia are composed of several layers of cells The mammalian skin is an example of dry, keratinised, stratified epithelium. The lining of the mouth cavity is an example of an unkeratinisied, stratified epithelium.
DESCRIPTION They form the lining of cavities such as the blood vessels, heart and lungs and make up the outer layers of the skin.
2) CONNECTIVE TISSUE –FUNCTION Connective tissue is the most abundant and widely distributed tissue type found in the animals body. The role of connective tissue is to protect, support, transport and bind together parts of the body. There are 5 types of connective tissue: Loose Dense Blood Cartilage Bone
CONNECTIVE TISSUE - DESCRIPTION Loose • found around glands muscles and nerves, filling spaces and holding organs in place. Adipose tissue is also an example Dense- • very flexible tissue, makes up tendons and ligaments Bloodliquid which carries food, oxygen and waste around the body Cartilage Bone rigid structure which provides support between bones hard mineral to support and protect the body
3) MUSCULAR TISSUE – FUNCTION In the mammalian body there is around 650 muscles and they make up roughly half of the animals bodyweight. These muscles can be divided into three different stiated groups: � skeletal, � Smooth � cardiac. � All of these muscles can stretch and contract, and their role is movement.
MUSCLE DESCRIPTION Skeletal muscle Smooth muscle Cardiac muscle • Produces movement, maintains posture, stabilises joints and generates heat • Found in the walls of hollow organs • Exists only in your heart
MUSCLE TISSUE – STRIATED CELLS
SKELETAL (STRIATED) MUSCLE The tissue most commonly thought of as muscle is skeletal muscle. Skeletal muscles cover the skeleton, giving the body its shape. They are attached to the skeleton by strong, springy tendons. Skeletal muscles are under voluntary control, which means you consciously control what they do.
CARDIAC MUSCLE The heart is made of cardiac muscle. This type of muscle only exists in the heart. Unlike other types of muscle, cardiac muscle never gets tired. It works automatically and constantly without ever pausing to rest. Cardiac muscle contracts to squeeze blood out of the heart, and relaxes to fill your heart with blood.
SMOOTH MUSCLE Smooth muscle is found in the walls of hollow organs like the intestines and stomach. They work automatically without you being aware of them. Smooth muscles in female's uterus (or womb) help to push offspring out of the body during birth.
4) NERVOUS TISSUE The nervous system is essentially the powerhouse of the brain, comprising the nervous tissue. It is classified into two parts: � The CNS or Central Nervous System that encompasses decision-making centres of the body, namely the brain and spinal cord; � The PNS or Peripheral Nervous System that consists of the remaining nervous tissues in our body. Function - Nervous tissue responds to stimuli, controlling and co coordinating many of the body functions by producing nerve impulses.