Comparing Nerve and Vein

Both nerves and veins form two vital components in transporting various elements in the body. While nerves form a part of the nervous system, veins on the other hand form an important component of the circulation system.

The key difference between nerves and veins is that nerves are an axon bundle of neurons forming a part of the peripheral nervous system carrying nerve impulses, while the veins are blood vessels that give back deoxygenated blood towards the heart. There is a difference in the size of nerves and veins as well.

Nerves

  • These are cable-like structures found in the body, framed for the conduction of the nerve impulses relaying information from one to another part of the body. They form a part of the nervous system
  • Nerves are typically composed of bundle of fibers enclosing layers of fat and tissue spreading across the body
  • Involved in the control and coordination of all parts of the body
  • Nerves are functional in passing information through the axons to the target structures
  • In addition to sending and receiving messages, they also process them into chemical signals, referred to as impulses

Veins

  • These are tube-like blood vessels found all through the body
  • These translucent structures operate by passing deoxygenated blood from tissues to the heart for it to get oxygen-rich again
  • Except for the pulmonary veins (it carries oxygenated blood) and umbilical veins, all the veins carry impure blood
  • Blood in veins flows with a lower speed and pressure
  • These walls of veins are found just underneath the skin and are thin

Key Differences between Nerve and Veins

The table below depicts the differences between Nerve and Veins.

Nerve

Veins

What are they?

Cord-like bundles composed of neurons through which impulses are transmitted between the Central Nervous system and the body

Tube-like structures constitute an important part of the circulatory system of the body. Primarily involved in carrying deoxygenated blood to the heart

Forms part of which system?

They form the nerve net of the nervous system

They form the venous system of the circulatory system

What do they carry?

Electrochemical pulses

Deoxygenated blood

What makes it?

Composed of axons and dendrites

Composed of three layers – membranous layer, a thin layer of bands of smooth muscle in the middle, and a layer of connective tissue

Is it interconnected?

Mostly not interconnected

All are interconnected

What is their role?

Vital in conducting sensory functions

Carries deoxygenated blood towards the heart

What are the different types of it?

Afferent, efferent, cranial, mixed and spinal nerves

Pulmonary, systemic, deep and superficial veins

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