histology

Graafian follicle

Formed before ovulation

Crossovers

Critical events in meiosis I, involving interchange of chromatid segments between homologous chromosomes

Male gametes

Four mature spermatozoa from one primary spermatocyte after meiosis II

Sperm maturation

Begins at puberty

Gonadotrophin releasing hormone

Produced by the Hypothalamus

Ovulation

Induced by LH peak

Secretory phase regulation

Done by Progesterone

Embryonal cavities

Intraembryonic cavity not formed during the second week

Lacunae appearance

Within Syncytiotrophoblast

Intraembryonic cavity origin

From Intermediate mesoderm

Heart beating

Starts on the 21st day

Morphogenesis start

Gastrulation

Umbilical cord vessels

One artery and one vein, not two veins

Pulmonary capillaries

Larger in diameter than systemic capillaries

Bronchioles epithelium

Not ciliated pseudostratified columnar

Venous valves

Consist of thin, paired folds

Blood drainage

From intervillous lakes back to maternal circulation through endometrial veins

Capillary bed supply

By metarterioles

Cardiovascular system lining

Simple squamous epithelium

Meiosis II completion

Only if oocyte is fertilized

Pressure in the left atrium exceeding that in the right atrium

Atrial pressure gradient

Cephalo-caudal folding

Folding bringing the primitive heart tube into the thoracic region of the embryo

False

Air moving across the vocal cords and causing them to produce sound is contacting Stratified squamous keratinized epithelium.

False

The pulmonary surfactant prevents alveolar collapse by increasing surface tension.

True

The visceral pleura that covers each lung is a layer of thin connective tissue and mesothelium.

True

Epithelial lining of the larynx develops from the endoderm of the laryngotracheal tube.

Albumin

Thyroid hormones are carried in blood bound to albumin.

Thyroglobulin

Thyroid colloid contains the glycoprotein thyroglobulin, the precursor for the active thyroid hormones.

Decrease

Chronic iodine deficiencies decrease thyroid hormone production.

True

The principal cells of the parathyroid glands are small polygonal cells with round nuclei and slightly acidophilic cytoplasm.

False

PTH decreases the activity of osteoclasts.

Vasa vasorum

Small vessels that supply blood to the tissues of the vessel.

Tunica media

The thickest layer of the wall of the arteries.

Receptor of the blood pressure

Main function of the carotid sinus.

Stratified squamous epithelium

The lining of lymphatic vessels is composed of this cell type.

Red blood cells

Least likely to be found in lymph fluid.

Are associated with capillary endothelial cells

True for pericytes.

Sinusoidal capillaries are found in the spleen

True description for discontinuous capillaries.

All of the above

Function of endothelium.

Receives blood directly from veins

True for atria.

Subendocardial layer

Name of the connective tissues deeper layer which starts in endocardium and continuous with myocardium.

Myeloblast

Most immature recognizable cell in myeloid series.

Albumin

Most abundant plasma protein.

Olfactory epithelium

The roof of the nasal cavities and the superior conchae are covered by this epithelium.