Dense Irregular: Fibers oriented differently. Found in skin.

Specialised Connective Tissue:

Cartilage: Solid, pliable, resists compression. Chondrocytes enclosed in small cavities within matrix. Found in nose tip, outer ear, joints, vertebral column.
Bone: Hard, non-pliable, rich in calcium salts and collagen. Osteocytes in lacunae. Provides structural frame, supports, protects organs, muscle attachment.
Blood: Fluid connective tissue. Plasma (fluid matrix), RBCs, WBCs, platelets. Transport.

Controls body's responsiveness to changing conditions.
Composed of neurons (excitatory cells) and neuroglia (support cells).
Neurons: Functional unit.
- Cell body, dendrites, axon.
- Stimulated, generate and transmit electrical impulses.
Neuroglia: Protect and support neurons. Make up more than half the volume of neural tissue.

Phylum: Arthropoda, Class: Insecta.
Nocturnal, omnivorous, found in damp places.
Body Segmentation: Head, Thorax, Abdomen.
Exoskeleton: Chitinous, sclerites (tergites dorsally, sternites ventrally) joined by arthrodial membrane.
Head: Triangular, anterior, right angles to body axis.
- Pair of antennae (sensory).
- Compound eyes.
- Mouthparts: Labrum (upper lip), mandibles, maxillae, labium (lower lip), hypopharynx (tongue).
Thorax: Prothorax, Mesothorax, Metathorax.
- Each segment bears a pair of walking legs.
- Forewings (tegmina) from mesothorax (opaque, leathery, cover hindwings).
- Hindwings from metathorax (transparent, membranous, used in flight).
Abdomen: 10 segments.
- Males: Anal cerci (paired), anal style (paired, short, thread-like, present only in males).
- Females: Brood or genital pouch (7th, 8th, 9th sterna).
Digestive System:
- Alimentary Canal: Foregut (mouth to gizzard), Midgut (hepatic caeca), Hindgut (ileum, colon, rectum, anus).
- Gizzard (Proventriculus): Grinding food.
- Hepatic Caeca: 6-8 blind tubules at junction of foregut and midgut, secrete digestive juice.
- Malpigh