Connective Tissue – Reticular Tissue
Loose network of thin, branching reticular (type III collagen) fibers forming a supportive framework. Commonly found in lymph nodes, spleen, and bone marrow.

Muscle Tissue – Smooth Muscle
Spindle-shaped cells with a single central nucleus and no striations. Arranged in layers and responsible for involuntary contraction. Found in the walls of hollow organs such as the intestines and blood vessels.

Nervous Tissue – Nerve Fiber
Long, slender extension of a neuron (axon), sometimes covered with a myelin sheath, specialized for impulse conduction. Present in peripheral nerves and the central nervous system.