Human Organ Systems

Human Organ Systems

Let's Review

​Biological Levels of Organization

Recall that there are biological levels of organization that include the cell and organism levels.​ Knowing the intermediate levels will help us understand the various structures that make up an organism.

Multiple Choice

Which level of organization refers to many similar cells organized together, with varying amounts and kinds of inorganic substances in between the cells?

• Organism

• Organ System

• Organ

• Tissue

Multiple Choice

Which level of organization refers to several different kinds of tissues organized together to perform a special function?

• Organism

• Organ System

• Organ

• Tissue

Multiple Choice

Which level of organization refers to various organs organized together to perform complex functions for the body?

• Organism

• Organ System

• Organ

• Tissue

Let's review

Human Organs and Organ Systems

Before learning about the tissues and cells that make up the various organs of the human body, do you still remember the human organs and organ systems?

Multiple Choice

To which organ system do the following organs belong: hair, skin, nails, and exocrine glands (e.g. sweat glands, lacrimal glands, salivary glands, mammary glands, digestive glands)?

• Skeletal

• Lymphatic

• Integumentary

• Endocrine

Multiple Choice

To which organ system do the following organs belong: pituitary gland, thyroid, parathyroid, adrenal gland, pineal gland, gonads, and pancreas?

• Lymphatic

• Nervous

• Circulatory

• Endocrine

Multiple Choice

Which of the following is NOT a main type of muscle organ of the Muscular System?

• Cardiac

• Intercostal

• Skeletal

• Smooth

Multiple Choice

Which of the following organs belongs to the Digestive System?

• Bladder

• Bronchi

• Liver

• Spleen

Multiple Choice

Which of the following organs does NOT belong to the Cardiovascular or Circulatory System?

• Blood

• Blood vessels

• Heart

• Tendons

Let's confirm

​Meaning of life for a cell and a multi-cellular organism

Multiple Choice

True or False: The cell is the smallest unit of life.

• True

• False

Multiple Choice

Only living cells carry out biological functions.

• True

• False

Learning Point

Only a living cell is able to carry out basic biological functions: maintain structural integrity, maintain homeostasis (i.e. state of steady internal, physical, and chemical conditions maintained by a living organism for its optimal functioning), respiration to obtain energy for cellular processes, and reproduction via cell division.  A cell that is part of a multicellular organism, has to be alive to be able to carry out the specialized function of the tissue/organ system it is part of.

Multiple Choice

True or False: If one cell of a multi-cellular organism dies, the organism dies.

• True

• False

Learning Point

Multiple cells of the same type that form tissues, perform the same function.  The death of one cell will have very minimal effect.  Also, the dead cell is oftentimes replaced by a living cell of the same type.

Multiple Choice

True or False: Even if all the cells of a multi-cellular organism die, the organism continues to live.

• True

• False

Learning Point

An organism is able to live if there are sufficient numbers of living cells and tissues that make-up the various organs and organ systems, to carry out the different biological processes needed for life.

 

Let's learn more

​Tissues and Cells of Human Organisms

Refer to Part B of the "Animal Organs, Tissues and Cells" worksheet.