Quick Answer: What Are The 11 Systems In The Body?

What is the hardest substance in the human body?

1.

Tooth enamel is the hardest substance in the body.

The shiny, white enamel that covers your teeth is even stronger than bone.

This resilient surface is 96 percent mineral, the highest percentage of any tissue in your body – making it durable and damage-resistant..

What are the 4 types of tissue?

There are 4 basic types of tissue: connective tissue, epithelial tissue, muscle tissue, and nervous tissue. Connective tissue supports other tissues and binds them together (bone, blood, and lymph tissues). Epithelial tissue provides a covering (skin, the linings of the various passages inside the body).

What are the 78 organs in the human body?

Among these 78 organs, five organs are considered as vital for survival. These include the heart, brain, kidneys, liver and lungs….Types of Organs in a Human Body.Adrenal GlandsBladderHeartKidneysPancreasPharynxThymus GlandTongueTestesSeminal vesicles13 more columns

What are the 11 major organ systems and their main functions quizlet?

Terms in this set (11)Cardiovascular System. Heart, Arteries, Veins, Capillaries. … Respiratory System. Lungs, Bronchi, Trachea, Larynx, Alveoli. … Urinary System. Urethra, Ureter, Urinary Bladder, Kidneys, Liver. … Endocrine System. … Lymphatic (immune) system. … Digestive System. … Muscular System. … Skeletal System.More items…

What is the smallest organ in your body?

pineal glandWhat’s the smallest organ in the human body? You’ll find the pineal gland near the center of the brain, in a groove between the hemispheres. It’s not an organ like those in the abdominal cavity.

What are the 12 body systems?

These different body systems include the skeletal, nervous, muscular, respiratory, endocrine, immune, cardiovascular/circulatory, urinary, integumentary, reproductive, and digestive systems.

What is a body function?

Body functions are the physiological or psychological functions of body systems. The body’s functions are ultimately its cells’ functions. Survival is the body’s most important business. Survival depends on the body’s maintaining or restoring homeostasis, a state of relative constancy, of its internal environment.

What is the largest organ in the body?

Skin is the human body’s largest organ. Body organs aren’t all internal like the brain or the heart. There’s one we wear on the outside. Skin is our largest organ—adults carry some 8 pounds (3.6 kilograms) and 22 square feet (2 square meters) of it.

What are the 11 body systems quizlet?

Terms in this set (11)Integumentary System. Organs: Skin and accessory organs (hair & nails) … Skeletal System. Organs: Bones, cartilage, and ligaments. … Muscular System. Organs: Skeletal, cardiac, and smooth muscles. … Nervous System. … Endocrine System. … Circulatory System. … Immune/Lymphatic System. … Respiratory System.More items…

What are the four functions of the muscular system?

The main functions of the muscular system are as follows:Mobility. The muscular system’s main function is to allow movement. … Stability. Muscle tendons stretch over joints and contribute to joint stability. … Posture. … Circulation. … Respiration. … Digestion. … Urination. … Childbirth.More items…•

What organ system is the skin in?

integumentary systemThe skin is the largest organ of the body. The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system. One of the main functions of the skin is protection.

What is the most important system in the body?

While your heart is a vital organ, the brain (and the nervous system that attaches to the brain) make up the most critical organ system in the human body. … The human nervous system is responsible for coordinating every movement and action your body makes.

What is the strongest muscle in the human body?

masseterThe strongest muscle based on its weight is the masseter. With all muscles of the jaw working together it can close the teeth with a force as great as 55 pounds (25 kilograms) on the incisors or 200 pounds (90.7 kilograms) on the molars.

What are the 11 body systems and their functions?

The main systems of the human body are:Circulatory system / Cardiovascular system: … Digestive system and Excretory system: … Endocrine system: … Integumentary system / Exocrine system: … Immune system and lymphatic system: … Muscular system: … Nervous system: … Renal system and Urinary system.More items…