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Phases of the ovarian cycle

By: HWC, Views: 8085

• The ovarian cycle is a monthly sequence of events, consisting of three phases: • Preovulatory • Ovulatory • Post ovulatory Preovulatory phase • prior to ovulation: Primary follicles develop into secondary follicles. • Follicular cells surrounding the primary oocyte In...

Uterine (menstrual) cycle - phases

By: HWC, Views: 7731

• The uterus goes through a cyclical developmental pattern to be ready for implantation and support of an embryo. • The uterine, or menstrual, cycle is under the control of ovarian horrnones. • The uterine cycle also has three phases: • Menstrual phase • Proliferative phase â€...

Summary of female reproductive cycle days 1-28

By: HWC, Views: 8166

â–  The first five days of the cycle include the menstrual phase. â–  Progesterone and estrogen levels are low. â–  Menses occurs. â–  GnRH pulses more frequently promoting FSH and LH levels to rise. â–  Primary follicles are stimulated to develop. â–  Days five through thirteen consist o...

Mechanisms of capillary exchange

By: HWC, Views: 7895

â–  The primary role of capillaries is to permit the exchange of nutrients and wastes between the blood and tissue cells (via interstitial fluid). â–  Oxygen and nutrients move from the blood to the cells. â–  Carbon dioxide and other wastes move from the cells to the blood. The three ba...

Bulk flow - Factors that influence bulk flow

By: HWC, Views: 7946

• Bulk flow helps regulate the relative volumes of blood and interstitial fluid. • Flow from blood to interstitium is called filtration. ■ Flow from interstitium to blood is called reabsorption. ■ Four factors determine the net direction of capillary exchange. ■ These factors in...

The primary factors that affect circulation - MABP, CO and SVR

By: HWC, Views: 8072

Introduction Blood flow is determined by the relative intensities of factors that drive and resist moving blood. • Cardiac output (CO) equals the mean arterial blood pressure (MABP, a driving force) divided by systemic vascular resistance (SVR, a resisting force). • Hormones and the cen...

Structures that affect circulation - heart and systolic/diastolic BP

By: HWC, Views: 7668

• Heart generates blood pressure. • Arterioles produce resistance thereby regulating blood flow to tissues. • Veins store blood; kidneys regulate blood volume; both affect venous return and cardiac output. ■ Contractions of the ventricles determine blood pressure, which drives th...

Structures that affect circulation - arterioles and vasomotor responses and venous return

By: HWC, Views: 7813

■ Small arteries and arterioles determine SVR. • Blood pressure drops significantly as blood passes through arterioles. • Decreasing arteriole radius and decreased wall elasticity are the main reasons for increased SVR. ■ Small changes in arteriole radius can cause large changes in ...

Structures that affect circulation - kidneys and blood volume and skeletal muscle pumping

By: HWC, Views: 8312

• Kidneys regulate blood volume and blood osmolarity via salt and water reabsorption. • Increased reabsorption increases blood volume and venous return (and CO). • Decreased reabsorption Increases urine production, which decreases blood volume and venous return (and CO). • Systemi...