
To live in a perfect, healthy body, you first need to understand your body's physiology, meaning what your body's systems do to keep working in constant harmony. More importantly, you must know how this links to your metabolism rate. So let’s take a quick tour inside your body to reveal a lot about its scientific and functional secrets.
First: What is metabolism rate?

It’s also called the body's burn rate, and many think it only means the rate that burns fat. But actually, it’s a full set of reactions that build up and break down the body. Here’s more about it.
Second: The body's inner makeup

To understand how important the link is between metabolism rate and your body’s systems, you first need to know what your inner makeup is. This makeup breaks down into small units, then bigger, then even bigger, like this:
- Cell: It's the basic building block of humans especially, and living things in general. Cells vary a lot and there are trillions of them. One cell ranges from 7 to 300 micrometers in size. Because cells have different jobs and functions, this shows how body structure and functions vary overall.
- Organelles: These are the bodies inside the cell. Organelles come in different shapes and have important jobs inside each cell depending on the cell type and where it is in the body's systems. Examples include the nucleus, plasma membrane, cytoplasm, Golgi apparatus, mitochondria, and others.
- Tissues: Since the cell is the smallest part of the human body and its basic building block, tissues are bigger parts made of many similar cells. One tissue is made of a group of cells alike in shape and function. That means cells generally build the body and tissues specifically.
- Organs: Organs are the bigger form made up of tissues and their cells. Each group of similar tissues in structure and job forms a specific organ. The organ plays a vital role in the body and is a basic building unit of the functional system it belongs to. Body systems generally include eleven vital systems.
Third: Vital Body Systems
First: The Integumentary System

This system covers the whole body and protects it from damage and external harm. It includes skin, nails, sweat glands, and the outer structure in general.
Second: The Skeletal System

This system gives the body a solid and firm structure. It makes the body strong and not soft. It consists of bones, ligaments, tendons, and more.
Third: The Muscular System

This system lets you do different physical movements and daily activities. It includes all the body's muscles like the heart muscle, tongue muscle, arm muscles, leg muscles, and so on.
Fourth: The Nervous System

It's the system made up of the brain, spinal cord, and different body nerves. It handles sensing and sends nerve signals between the brain and the rest of the body to tell other organs what to do.
Fifth: The endocrine system

This system releases various body hormones that stimulate organs to work, like thyroid hormones, growth hormone, insulin, and others.
Sixth: The circulatory system

It's made up of the heart, arteries, and veins. Blood flows through these carrying oxygen, carbon dioxide, and nutrients to and from body cells.
Seventh: The immune system

It’s the body's first line of defense. It protects against diseases caused by foreign bodies like viruses and harmful bacteria by attacking and destroying them. White blood cells are part of this system.
Eighth: The respiratory system

This system includes the nose, lungs, diaphragm, and windpipe. It helps exchange oxygen in and carbon dioxide out during breathing.
Ninth: Digestive system

It is the system responsible for digesting, absorbing food, then moving it into the blood to feed the whole body's cells. You can learn more about how digestion works in your body here.
Tenth: The urinary system

This system includes the kidneys, ureters, and bladder, and its job is to clean the blood from toxins and waste and get rid of them outside the body.
Eleventh: The reproductive system

This system handles reproduction and is made up of the body's reproductive organs.
Fourth: What’s the link between metabolism rate and body systems?

As we said before, the metabolism rate controls all the reactions happening in the body overall. So it naturally controls how the body’s systems perform their functions. Its role isn’t just burning body fat but is only a small part of its big job that covers all the body's functions including:
- Growth and renewal of body cells.
- Exchange of oxygen and carbon dioxide in breathing.
- Digestion, and absorption of nutrients.
- Blood circulation, other fluids inside the body.
- Getting rid of waste.
- Reproduction
And you can browse more articles from here, also you can know the benefits of subscription with Fitness Garage from here.