Lab Animal Health and Disease Assessment

Implantation where the embryo burrows into the uterine wall, eventually losing contact with the uterine lumen.

Implantation where the embryo remains within the uterine lumen throughout pregnancy, never burrowing into the uterine wall

The process by which the amnion, a membrane filled with amniotic fluid, forms around the embryo.

A type of amniogenesis where the amnion forms by folding in of the trophoblast tissue around the developing embryo.

A type of amniogenesis where the amnion forms by splitting of the inner cell mass. The inner cell mass separates into the embryo and the amniotic sac.

The process by which the inner cell mass hollows to form a cavity that will give rise to, among other things, the amnion.

The cavity above the embryo formed by the folding of the trophoblast in plectamnion amniogenesis.

A type of amniogenesis seen in most rodents, except the hamster and guinea pig, where the amnion forms from the folding of the trophoblast.

This refers to the growth of rodent incisors, which can lead to problems if not properly managed. Rodents need to wear down their teeth by gnawing on appropriate materials.

This can be a cause of disease in rodents. When rodents don't have enough to chew on, they may start chewing the fur of other rodents, leading to skin damage and potential infections. This is often caused by boredom.

This is a common non-infectious cause of disease in lab animals. It can include issues like poor diet, lack of space in their cage, and exposure to harmful substances.

This is a non-infectious cause of disease in lab animals. It can range from minor injuries to major trauma, leading to various problems.

This is a non-infectious cause of disease in lab animals, and it can be caused by genetics or the way the animal is living.

A complex network formed when the tips of neighboring villi fuse in the villous placenta. This type of placenta is found in carnivores, rodents, apes, and rabbits.

The number of tissue layers that nutrients must cross from the maternal blood to the fetal blood in the placenta. This classification helps understand how closely the maternal and fetal circulations are connected.

A type of placental barrier where six layers of tissue separate the maternal and fetal circulations. This is the least invasive type.

The classification of placentas based on the number of tissue layers separating the maternal and fetal blood.

The process by which the placenta invades the uterine wall, allowing better nutrient exchange but potentially leading to complications.

The outermost layer of the placenta, formed from the fetal tissue. It directly interacts with the maternal blood.

The layer of the trophoblast that directly contacts the maternal blood. It facilitates gas and nutrient exchange.

A placenta type where the maternal capillaries are close to the fetal capillaries, reducing the number of tissue layers. It occurs in humans.

A condition characterized by symptoms like lethargy, bloody gums, internal bleeding, muscle weakness, bleeding in muscles, anemia, and bleeding in the paws.

A bacterial infection that can affect the respiratory system of mice and rats. Symptoms include torticollis and pneumonia.

A condition where the head is tilted to one side. It can be caused by a variety of issues including ear infections, neurological problems, and infections like Mycoplasma.

Inflammation of the lungs, often caused by bacterial or viral infections. In rats, Mycoplasma can lead to a severe form.

A general symptom indicative of illness in animals. It refers to a change in behavior, including sluggishness, lack of social interaction, and reduced grooming.

A general symptom indicative of illness in animals. It refers to the posture or position of the animal, including hunched back, torticollis, abnormal limb position, and ruffled fur.

A general symptom indicative of illness in animals. It refers to a change in feeding and water intake, including loss of appetite, weight loss, and dehydration.

Reduction in food consumption due to illness. It can be a key indicator of disease.

Classification of placentas based on the shape of the structure, surface morphology of the chorion, placental barrier and endometrial invasion, trophoblast cytology, fate of the maternal endometrium, composing fetal membranes & vasculature, paraplacental structures, and implantation types.

These are structures located outside of the main placental area, but still play a role in pregnancy. Examples include areolae in pigs, marginal hematomes, endometrial cups, and subplacenta.

These are domes of trophoblast located on the endometrium in pigs. They have increased glandular activity and are sites of histiotrophic nutrition, playing a role in iron transfer. Numerous, branched chorionic villi float in the space between the chorion and endometrium.

The type of placental barrier present in carnivores where fetal cells form a layer around maternal vessels, but lack microvilli due to the absence of surface extensions on individual cells.

These are microscopic extensions of individual cells present in most placenta types, but absent in endotheliochorial placentas. They aid in nutrient and waste exchange.

This type of nutrition in placentas involves the uptake of nutrients directly from the maternal tissues, rather than through blood circulation. It plays a role in iron transfer in pigs with areolae.

The process of red blood cell breakdown and absorption. It's not a direct function of paraplacental structures, but may be involved in some contexts.

A type of placental nutrition in which nutrients are absorbed from the maternal blood circulation. It is the primary mode of nourishment in placentas and is not a function of paraplacental structures.

The scientific name of an organism, consisting of two parts: the genus name and the species epithet.

A group of closely related species.

A group of closely related genera.

A group of closely related families.

A group of closely related orders.

A group of closely related classes.

The second part of a scientific name, specific to the particular species.

Animals with a vertebral column.

Animals that give birth to live young, usually after a period of gestation in the mother's womb.

A classification system used to organize living organisms into hierarchical groups based on their shared characteristics.