Starred Slides

Comprehensive practice flashcards reviewing animal anatomy fundamentals, tissue classifications (epithelial, connective, muscle, nervous), anatomical planes, directional terminology, and body cavities with their serous linings.

How is a tissue defined in the hierarchy of anatomical building blocks?

A collection of cells and their products in which one cell type dominates (e.g., muscle tissue, epithelial tissue).

How is an organ defined?

A collection of tissues forming a structure within an animal adapted for a specific purpose (e.g., liver, skin, trachea).

How is an organ system defined?

A collection of organs and tissues related by their functions (e.g., gastrointestinal/digestive system).

What are the four primary animal tissue types and their main general roles?

Epithelial (protective, covering, lining, and secretory/absorbent functions), Connective (binds and supports other tissues), Muscle (brings about movement and contraction), and Nervous (conveys nerve impulses from one area to another and coordinates responses).

What mnemonic is given for the four primary animal tissue types and their core functions?

E-C-M-N: Epithelial (Envelope), Connective (Connect), Muscle (Move), and Nervous (Notify).

How is epithelial tissue classified based on layers and cell shape?

By layers as Simple (single-layered) or Stratified (multi-layered), and by cell shape as Squamous, Cuboidal, or Columnar.

What is the specialized name for epithelial tissue lining the inside of the heart, blood vessels, and lymphatic vessels?

Endothelium (from 'ENDO' meaning inside).

What characterizes a mucous membrane, and where is it typically located?

It is an epithelium containing mucus-secreting goblet cells, typically found lining organs that have connections to the outside (such as the mouth, nose, and urogenital tract).

What is a serous membrane and what is the role of serous fluid?

A serous membrane lines closed body cavities (such as the thoracic and abdominal cavities) and produces a small amount of watery serous fluid to reduce friction between internal organs and the cavity wall.

Why is blood categorized as a specialized connective tissue?

Because its cells are suspended and embedded in a liquid extracellular matrix or ground substance known as plasma.

What is the function of haematopoietic tissue?

It forms bone marrow and is responsible for blood cell formation.

What are the three primary functions of adipose tissue mentioned in the lecture?

Insulating against heat loss, serving as energy reserves, and protecting internal organs like the kidneys.

How do collagen fiber arrangements differ between parallel dense connective tissue and irregularly interwoven dense connective tissue?

Parallel collagen fibers form tendons (connecting muscle to bone) and ligaments (connecting bone to bone), whereas irregularly interwoven fibers occur in the skin dermis, joint capsules, testes, and lymph nodes.

What dense connective tissue is being demonstrated here that surrounds muscles, nerves, and blood vessels like cling wrap?

Fascia.

What makes loose (areolar) connective tissue unique, and where is it found?

It comprises collagen, elastin, and reticular fibers with significant empty space; it is soft enough to provide cushioning and flexibility while strong enough to bind tissues (e.g., under the skin), and is the most widely distributed connective tissue in vertebrates.

What ground substance and mineral deposits give bone its hardness?

Its ground substance is osteonectin with collagen fibers, which undergoes calcification via the deposition of hydroxyapatite crystals of calcium and phosphate.

What is the cellular and structural composition of cartilage, and where is it located?

It is composed of chondrocytes and fibers embedded in a gel-like ground substance; it is rigid but flexible, bears weight, and is found in the larynx, ears, nose, ribs, and trachea.

What are the key structural and functional differences among skeletal, cardiac, and smooth muscle tissues?

Skeletal muscle consists of voluntary, long, cylindrical, striated multinucleated cells that move the skeleton; cardiac muscle consists of involuntary, striated, cylindrical cells connected by intercalated discs in the heart; smooth muscle consists of involuntary, non-striated, spindle-shaped cells with a single central nucleus found in hollow organs like the digestive tract and uterus.

What are the basic functional components of a neuron?

A cell body containing the nucleus, dendrons/dendrites that carry information towards the cell body, and an axon that carries information away from the cell body (often wrapped in myelin to increase impulse transmission speed).

What is the primary role of glial cells in nervous tissue?

To support, protect, and maintain neurons.

In veterinary directional terminology, what do the terms 'cranial' and 'caudal' indicate?

'Cranial' means towards the head (or towards the front/head on upper limbs), whereas 'caudal' means towards the tail (or towards the back/tail on upper limbs).

What directional term specifies a position toward the nose within the head region?

Rostral.

What do the directional terms 'dorsal' and 'ventral' refer to on an animal's trunk?

'Dorsal' means towards the vertebral column (and corresponding upper surfaces of the head, neck, and tail), while 'ventral' means towards the abdomen (and corresponding lower surfaces of the head, neck, and tail).

What is the difference between 'medial' and 'lateral'?

'Medial' indicates a direction towards the midline, while 'lateral' indicates a direction towards the side of the animal.

How are 'proximal' and 'distal' defined with respect to limbs?

'Proximal' means towards the body, while 'distal' means away from the body.

What directional terms refer to the ground-contacting surfaces of the forelimbs and hindlimbs?

'Palmar' refers to the lower surface of the forelimb contacting the ground, and 'plantar' refers to the lower surface of the hindlimb contacting the ground.

How do the median, sagittal, and paramedian planes differ?

The median plane divides the body into symmetrical left and right halves; the paramedian plane is situated close to the median plane; a sagittal plane runs parallel to the median plane.

What are the definitions of the dorsal plane and transverse plane?

A dorsal plane sections the trunk or other part parallel to the dorsal surface, whereas a transverse plane cuts across the trunk, head, or limb perpendicular to its long axis (like a cross-section).

In anatomical directional terminology, what directional terms are indicated by the arrows pointing toward the surface versus toward the center in this cross-section of a limb?

Superficial (towards the surface) and Deep (towards the centre).

In veterinary anatomy, what terms describe movement towards versus away from the central axis of the limb, as shown in this diagram?

Axial (towards the central axis of the limb) and Abaxial (away from the central axis of the limb).

Which cavities make up the dorsal body cavities, and what structures do they house?

The cranial cavity (housing the brain) and the spinal cavity (housing the spine/spinal cord).

What three main cavities constitute the ventral body cavities?

The thoracic cavity, abdominal cavity, and pelvic cavity.

How do the parietal and visceral layers of a serous membrane differ in arrangement?

The parietal layer lines the boundaries or walls of the body cavity, while the visceral layer directly covers the organs inside the cavity.

What structures form the anatomical boundaries of the thoracic cavity?

The thoracic inlet, the diaphragm, ribs, thoracic vertebrae, sternum, and thoracic muscles.

What is the pulmonary pleura and the pleural space?

The pulmonary pleura is the visceral pleura covering the lungs; the pleural space (pleural cavity) is the fluid-filled space between the pulmonary pleura and parietal pleura that contains lubricating pleural fluid.

What is the mediastinum, and what organs are housed within the pericardial cavity located in it?

The mediastinum is a connective tissue septum between the left and right pleural cavities; its pericardial cavity houses the heart, aorta, trachea, oesophagus, and the thymus (in young animals only).

What are the anatomical boundaries of the abdominal cavity?

The diaphragm, pelvic inlet, lumbar vertebrae, hypaxial muscles, and the muscles of the abdominal wall.

What is the mesentery, and how are its specific folds named?

The mesentery is formed by visceral peritoneum folded on itself that suspends organs, keeps them separate, and carries blood vessels and nerves to the abdominal viscera; folds are named according to the organ they surround, such as mesoduodenum (duodenum) and mesovarium (ovary).

How is the pelvic cavity related to the abdominal cavity?

There is no physical separation between them; a continuation of the peritoneum extends into the cranial part of the pelvic cavity, covering the urinary bladder and parts of the reproductive tract.

What type of anatomical section and body cavities are shown in this diagram?

A dorsal plane section through the ventral body cavities (depicting the thoracic cavity, diaphragm, abdominal cavity, and pelvic cavity).