Quick Answer: What Is The Basic Structural And Functional Unit Of The Body?

What is the smallest structural and functional unit of the body?

The cell is the smallest structural and functional unit of living organisms, which can exist on its own.

Therefore, it is sometimes called the building block of life.

Some organisms, such as bacteria or yeast, are unicellular—consisting only of a single cell—while others, for instance, mammalians, are multicellular..

What is the structural and functional unit of lungs?

The alveoli are the functional units of the lungs and they form the site of gaseous exchange.

What is the structural and functional unit of excretory system?

The Human Excretory System | Back to Top. The urinary system is made-up of the kidneys, ureters, bladder, and urethra. The nephron, an evolutionary modification of the nephridium, is the kidney’s functional unit.

What is the structural and functional unit of nervous system?

Neurons. Neurons, or nerve cell, are the main structural and functional units of the nervous system. Every neuron consists of a body (soma) and a number of processes (neurites).

What is the basic unit of function?

The cell is the fundamental unit of structure and function in living things. All organisms are made up of one or more cells.

Which is the largest cell?

eggThe sperm is the smallest cell in human biology, but also one of the most complex. The egg meanwhile is the largest cell and similarly intricate. Looking further out into the natural world, the diversity of these sex cells, or gametes, is truly remarkable. Most species have two gametes, which we term male and female.

What is the meaning of structural and functional unit of life?

The cell is called the structural and functional unit of life as all living organisms are made up of cells. … Furthermore, cells provide form and structure, process nutrients and convert it into useable energy. Multicellular organisms have specialized cells that perform specific functions.

What’s the basic structural unit of the body?

cellsIn anatomy, the basic structural unit of the body is the cell. All living organisms have cells, which start as the zygote — the single cell at the beginning of life, after a spermatazoon fertilizes an oocyte.

Why are there two types of nephrons?

There are two types of nephrons: Superficial cortical nephrons, which have their glomeruli in the outer cortex. They have shorter loops of Henle, which dip only into the outer medulla. … They have larger glomeruli, and thus have higher glomerular filtration rates (GFR).

What is the functional unit of heart?

Coordinated contractions of cardiac muscle, which are controlled by special cells called pacemaker cells, allow for your heart to pump blood as a single functional unit. Inside your heart are four chambers. The top two chambers are called atria. The atria receive blood from other parts of your body.

What is the structural similarities between all the respiratory organs?

These organs have been structured to allow easy diffusion of respiratory organs and are made up of thin walls to facilitate the exchange of these gases. The respiratory organs like gills, skin, and lungs are all provided with a rich supply of blood for proper functioning and for transporting the respiratory gases.

What is structural and functional unit of liver?

The hepatic lobules are the structural and functional units of liver containing hepatic cells arranged in the form of cords.

Why is the cell called the structural and functional unit of?

The cell is called the structural and functional unit of life as all living organisms are made up of cells. … Furthermore, cells provide form and structure, process nutrients and convert it into useable energy. Multicellular organisms have specialized cells that perform specific functions.

What is the smallest thing in your body?

stapesConveniently, that would be the stapes. It is one of three tiny bones in the middle ear that convey sound from the outer ear to the inner ear. Collectively called the ossicles, these bones are individually known as the malleus, incus, and stapes.

What is the structural unit of an organ?

cellIn this chapter, you shall learn about the basic structural unit of an organ, which is the cell. Cells may be compared to bricks. Bricks are assembled to make a building. Similarly, cells are assembled to make the body of every organism.

Which is the structural and functional unit of kidney?

Together, the renal cortex and renal pyramids constitute the functional portion or of the kidney. Within the parenchyma are about 1 million microscopic structures called , which are the functional units of the kidney. The number of nephrons is constant from birth, and injured or diseased nephrons cannot be replaced.

What are the structural and functional unit of brain?

Neurons. The basic functional unit of the brain is the neuron. … The average brain contains roughly 100 billion neurons. Although there are upwards of 1,000 different types of neurons, they all have the same basic structure and function.