What is a tissue?
A collection of cells that are similar in structure and work together to perform a particular function.
How many main types of tissues are there in the human body?
Four types: muscle, nervous, epithelial, and connective.
What are the three types of muscle tissue?
- Skeletal muscle
- Smooth muscle
- Cardiac muscle
What is the function of skeletal muscle?
Moves the bones in the trunk, limbs, and face.
What does smooth muscle handle?
Body functions that cannot be controlled consciously, such as the movement of food through the digestive system.
Where is cardiac muscle found?
In the heart, pumping blood through the body.
What is the primary function of nervous tissue?
To receive and transmit messages in the form of electrical impulses.
What are the specialized cells in nervous tissue called?
Neurons.
Where is nervous tissue found in the body?
- Brain
- Spinal cord
- Nerves
- Parts of sensory organs, such as the retina
What are the functions of nervous tissue?
- Senses changes in the internal and external environment
- Interprets sensory information
- Causes movement in response to sensory information
- Coordinates voluntary and involuntary activities
- Regulates some body processes
What are the five human body cavities?
- Cranial cavity
- Spinal cavity
- Thoracic cavity
- Abdominal cavity
- Pelvic cavity
Fill in the blank: The human body begins to take shape during the earliest stages of _______.
embryonic development.
True or False: By the end of the third week, the human embryo has developed bilateral symmetry.
True.
What is the role of epithelial tissue?
To cover and protect body surfaces and to line external and internal body surfaces
What is the role of connective tissue?
To support, bind, and protect structures in the body.
What is the matrix in connective tissue?
The extracellular component that provides structural and biochemical support to surrounding cells.
Summarize the organization of tissues, organs, and organ systems.
Tissues form organs, and organs work together in organ systems.
What are the four main types of tissues in the human body?
Muscle tissue, Nervous tissue, Epithelial tissue, Connective tissue
What is epithelial tissue?
Layers of cells that line or cover all internal and external body surfaces
What is the primary function of epithelial tissue?
To provide a protective barrier for body surfaces
What is the structure of epithelial tissue?
Cells that are tightly bound together
What characterizes the epithelial tissue lining blood vessels?
A single layer of flattened cells
What special features does the epithelial tissue lining the trachea have?
Cilia-bearing cells and mucus-secreting cells
