sight The eye is the organ of sight. it is made up of the eyeball and protected by the eyebrows,eyelids and eye lashes.
Process of sight First light goes through the cornea. Then light passes through the pupil,the opening of the iris. After that light passes through the lens with focuses the image on the retina. The information in the retina travels to the brain through the optic nerve
smell Thenose is the organ of smell.The receptorsof smell are in the pituitary gland,inside the nostrils.
hearing The ear is the organ os hearing. It has three parts: The outer ear The middle ear The inner ear
The process of hearing First the outer ear receives sounds Then the middle ear changes sounds into vibrations. Finally the inner ear changes vibrations into nerve impulses that go to the brain
touch The skin is the organ of touch. It is made up of three layers: Epidermis Dermis Hypodermis
taste The tongue is the organ of taste. The receptors of taste are in the taste buds. There are taste buds all around the tongue.
The nervous system The nervous system is made up of nerve centres and nerves.
The peripheral nervous system is made up of: Sensory nerves Motor nerves The central nervous system has two parts: The brain The spinal cord
neurons They are made up of a cell body,dendrites and axons. Neurons receive information from other neurons.
Voluntary and involuntarymovements Ourbodies react to stimuli making voluntary or involuntary movements.
Voluntary movements When we see the clouds our sensory nerves inform the brain about this. Our brain processes the information and produces a response. Our motor nerves transmit a response to the muscles.
Involuntary movements The spinal cord produces a response in the case of involuntary movements. Sensory nerves transmit information about involuntary movements to the spinal cord. The spinal cord produces a very fast response.
The skeletal system Theskeletal and muscular system is in charge of carrying muscular responses created by the nervous system.it is made up of the skeleton and the musculature.
The skeleton The skeleton is made up of all the bones in the body. Head bones:skull bones and facial bones. Trunk bones:spine and rib cage. Limb bones:there are two groups the upper limb bones and the lower limb bones.
joints The joints are located where two or more bones meet.Bones are connected by ligaments. There are three types of joints: Moveable joints Semi-moveable joints Fixed joints
The musculature The musculature is the set of muscles in the body.locomotor muscles are conected to the bones.when they contract or relax,they move the bones. Head muscles:masseter,buccinator and orbicular. Trunk muscles:sternocleidomastoid,abdominal, pectoral,intercostal and trapezius. Limb muscles:biceps,triceps,deltoid,quadriceps, gluteus and calf muscles. .