Simple columnar epithelia or stratified squamous epithelia are the two types of epithelial tissue that line the mucous membrane. The mucous membrane's epithelial tissue provides defense and inhibits the entry of hazardous compounds. Since the lamina propria, a layer of areolar connective tissue found underneath all mucous membranes, lies on top of the epithelial sheet, this also connects to the connective tissue. In addition to providing structural support, the areolar connective tissue nourishes the epithelial cells.
Nervous tissue can be found in the cutaneous membrane, which is the skin. The dermis layer of the neural tissue has nerve fibers that enable touch and other senses.
When injured, the covering and lining epithelial help protect and prevent bacteria and harmful substances from entering the skin. It also has high regenerative capacities which allows the injured region of the skin to produce a new layer allowing the scab to fall off.
Muscle and nerve tissue are interdependent because electrical impulses are recognized by nerve tissue cells, which subsequently transfer those signals to the muscle tissues to control and balance body functions. These signals are picked up by muscle fibers, causing them to contract and enabling muscle movement.
The cardiac muscle forms the walls of the heart and the pericardium of the serous membrane also encloses the heart. The cardiac muscle plays a vital role in producing contractions that facilitate blood flow. The pericardium also aids in blood flow and lessens friction during cardiac muscle contractions.
The blood's role in providing the right nutrients and oxygen to the neurons is linked to the neurological system. For the brain and spinal cord to receive enough nutrients for effective functioning, blood must pass via capillaries spread throughout the nervous system.

Tissues!!!

Membranes
(membranes that line and cover the body)

Cutaneous

- surrounds the body's exterior (skin)
- is dry and is in contact with the atmosphere

Mucous

- line bodily cavities accessible to the external environment (hollow organs of the digestive, respiratory, and urogenital systems)
- moist membranes
- often designed to secrete and absorb

Serous

- Serous fluid divides the visceral and parietal layers of closed ventral body cavities.
- wet membrane

Muscle
(vascularized, enabling most forms of mobility in the body)

Structure

- composed of numerous muscle fibers
- have myofilaments which are complex networks of actin and myosin filaments

Functions

- contraction and relaxation, blood circulation, and mobility

Skeletal

- constitute the body's flesh
- creates voluntary muscular contractions resulting in bodily motions

Cardiac

- exclusively present within the heart's walls
- contractions assist in distributing blood to every area of the body via the blood vessels
- involuntary muscle

Smooth

- mostly present in hollow organ walls
- alternating between contracting and relaxing to propel things through the organs
- involuntary muscle

Nervous
(principal part of the nervous system)

Neurons

- react to external inputs through dendrites (receives information) and sends to cell body (interprets data)
- send electrical impulses inside the body through structures called axons.

Supporting Cells

- also referred to as glial cells
- preserve, cushion, and reinforce fragile neurons.

Location

- brain, spinal cord, nerves (nervous system)

Function

- coordinating, communication, and managing activities

Epithelial
(layer of cells that covers surface of body and lines body cavities)

Covering and Lining Epithelia Cells

- constitutes the skin's outer layer
- lines the body's open and closed cavities
- covers both internal and exterior surfaces

- Simple Epithelia (single cell layer)
- Stratified Epithelia (two or more layers)

Location: epidermis, lines organs

Functions: protection, absorption, filtration, excretion, secretion, and sensory reception

Glandular Epithelia Cells

- Unicellular (one-cell)
- Multicellular (many cells)

Functions:
- Exocrine glands: secretion, lubrication, digestion
(secretion to ducts; externally)
- Endocrine glands: hormone secretion
(secreted into bloodstream; internally)

Location:
- Endocrine Glands: pituitary, thyroid, adrenal glands, etc.
- Exocrine Glands: sweat, salivary, mucous glands, etc.

Structure of Multicellular exocrine Glands:
- simple (unbranched) or compound (branched)
- tubular (form tubes) or alveolar (form sacs) or tuboalveolar (from tubes and sacs)

Connective
(located all throughout the body. Mesenchyme is the embryonic source which connective tissues develop and it consists of the extracellular matrix)

Structure

- Ground Substance: has fibers & occupies gaps between cells
- Fibers: proteins that give stability
- Cells: immature and mature cell types (ex. fibroblast-fibrocyte)
- Blood: does not constitute the fluid matrix (hematopoietic stem cell)

Functions

- storing fuel reserves, joining and support, protection, insulation, moving materials throughout the body.

Cartilage

Connective Tissue Proper

Loose Connective Tissue:
- Areolar: Most commonly used connecting bodily parts
- Adipose: high vascularization, nutrition storage, resistance to heat loss
- Reticular: White blood cells is one cell type supported by the stroma made up of fibers.

Dense Connective Tissue:
- Dense Regular: made up of packed collagen fibers running parallel to the pull, flexible structures that withstand strain
- Dense Irregular: Thicker collagen fibers that withstand tension travelling in any direction and organized erratically
- Elastic: keeps blood flowing through arteries, permits tissue to retract after stretching, and ligaments are very elastic.

- Hyaline: offers stable foundation with flexibility.
- Elastic: possesses lots of elastic fibers allowing flexibility while maintaining the structure's shape.
- Fibrocartilage: Has tensile strength so it can withstand compressive shocks.

Bone

- remarkable capacity for protection of body structures.
- The skeleton's bones are used to produce new blood cells and store fat.

Blood

- carries nutrients, wastes, respiration gasses, and other materials.

Tissue Repair Process

Inflammation

- inflammatory chemicals released
- Clotting closes off wounded region and stops transmission of bacteria and harmful substances.
- clot forms a scab eventually

Organization Restore Blood Supply

- granulation tissue takes the place of the clot.
- growth regulators and gap-bridging collagen fibers produced by proliferating fibroblasts.
- dead cells and debris are phagocytized
- epithelial cells expand and move over granulation tissue.

Permanent Repair

- scab separates as the epithelium beneath it thickens
- resulting epithelium is entirely repaired, with a patch of tissue scarring underneath.