Blood and Nerve Supply in Human – Branches and Components

Nerves and Blood Supply

• Nerves and blood supply are both important in the function of the human body. Nerves are responsible for transmitting messages between the brain and the rest of the body, while blood supply is responsible for delivering nutrients and oxygen to tissues and organs.
• The nervous system is made up of two main parts: the central nervous system and the peripheral nervous system. The central nervous system consists of the brain and spinal cord, while the peripheral nervous system consists of all the other nerves in the body.
• Nerves are made up of bundles of nerve cells called neurons. The central nervous system is protected by the skull and vertebrae, while the peripheral nervous system is protected by the skin.
• Blood is transported around the body by the circulatory system, which is made up of the heart, arteries, veins, and capillaries. The heart is a muscle that pumps blood around the body.
• Arteries are tubes that carry blood away from the heart, while veins are tubes that carry blood back to the heart. Capillaries are the smallest blood vessels in the body, and they are responsible for transferring nutrients and oxygen from blood to tissues.
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Nervous System

• The nervous system is a complex network of cells and tissues that control all the activities of the body. It consists of the brain, spinal cord, and a vast network of nerves that extend throughout the body.
• The brain is the center of the nervous system, and it controls all the activities of the body.
• The spinal cord is a bundle of nerves that extends from the brain and controls all the activities of the body below the neck.
• The nerves are slender tubes that extend from the spinal cord and spread throughout the body. They carry messages from the brain and spinal cord to the rest of the body, and they carry messages from the body to the brain and spinal cord.

Teeth Nerve Supply

• The teeth are supplied with sensation by the inferior alveolar nerve, the lingual nerve, and the buccal nerve.
• The inferior alveolar nerve is a branch of the mandibular nerve, which is a branch of the trigeminal nerve.
• The lingual nerve is a branch of the facial nerve. The buccal nerve is a branch of the maxillary nerve, which is a branch of the trigeminal nerve.

Facial Nerve Supply

The facial nerve (CN VII) exits the skull via the stylomastoid foramen and innervates all the muscles of facial expression. It also provides parasympathetic secretomotor innervation to the lacrimal and salivary glands.

The facial nerve also provides sensory innervation to the skin of the face.

Optic Nerve Vascular Supply

• The optic nerve is a structure that transmits visual information from the eye to the brain. It is a bundle of nerve fibers that extend from the back of the eye to the brain.
• The optic nerve is supplied with blood by a number of small blood vessels that run along its length. These blood vessels are responsible for delivering oxygen and nutrients to the optic nerve. Any damage to the optic nerve can result in impaired vision or blindness.

Blood and Nerve Supply of Heart

• The heart is supplied with blood by the two coronary arteries, which branch off from the aorta.
• The coronary arteries supply the heart muscle with oxygen-rich blood. The heart is also supplied with nerve fibers that control the heart’s rhythm.