BIO101 – Topic 8: Tissues and Organs
Course Code: BIO 101
Course Name: General Biology
8.1 Definition of Tissues and Organs
Tissues are groups of similar cells that work together to perform a specific function. Organs are
structures made up of two or more types of tissues working together to perform a particular function
within an organism.
8.2 Types of Animal Tissues
Animal tissues include epithelial, connective, muscular, and nervous tissues, each with specific functions
and examples.
8.3 Types of Plant Tissues
Plant tissues are categorized as meristematic (actively dividing) and permanent (mature specialized
tissues).
8.4 Structure and Functions of Major Organs
Animals have organs like the heart, lungs, and brain. Plants have organs like roots, stems, leaves, and
flowers, each serving specific roles.
8.5 Importance of Tissues and Organs
They enable division of labor, specialization, and efficiency in biological processes.
Structure and Functions of Major Organs (Animals)
Organ Main Tissues Present Function
Heart Cardiac muscle, connective, epithelial, nervous
Pumps blood throughout the body
Stomach Epithelial, muscle, connective, nervous Digestion of food
Lungs Epithelial, connective, nervous Gas exchange (oxygen and carbon dioxide)
Brain Nervous, connective, epithelial Control center for body activities
Structure and Functions of Major Organs (Plants)
Organ Function
Root Anchors plant, absorbs water and minerals
Stem Supports leaves and transports substances
Leaf Photosynthesis and gas exchange
Flower Reproduction
Course Code: BIO 101
Course Name: General Biology
8.1 Definition of Tissues and Organs
Tissues are groups of similar cells that work together to perform a specific function. Organs are
structures made up of two or more types of tissues working together to perform a particular function
within an organism.
8.2 Types of Animal Tissues
Animal tissues include epithelial, connective, muscular, and nervous tissues, each with specific functions
and examples.
8.3 Types of Plant Tissues
Plant tissues are categorized as meristematic (actively dividing) and permanent (mature specialized
tissues).
8.4 Structure and Functions of Major Organs
Animals have organs like the heart, lungs, and brain. Plants have organs like roots, stems, leaves, and
flowers, each serving specific roles.
8.5 Importance of Tissues and Organs
They enable division of labor, specialization, and efficiency in biological processes.
Structure and Functions of Major Organs (Animals)
Organ Main Tissues Present Function
Heart Cardiac muscle, connective, epithelial, nervous
Pumps blood throughout the body
Stomach Epithelial, muscle, connective, nervous Digestion of food
Lungs Epithelial, connective, nervous Gas exchange (oxygen and carbon dioxide)
Brain Nervous, connective, epithelial Control center for body activities
Structure and Functions of Major Organs (Plants)
Organ Function
Root Anchors plant, absorbs water and minerals
Stem Supports leaves and transports substances
Leaf Photosynthesis and gas exchange
Flower Reproduction
