Explanation:
The testes create sperm that develops in the epididymis, a coiled tube. After $exual contact, they pass via the oviducts and combine with fluids generated by the prostate gland and seminal vesicles. The sperm then proceed down the urethra to the tip of the shaft, where they are discharged into the genital canal of the female. YW:)
I believe it’s B. Because pesticides aren’t really helping the environment.
The SA Node is the heart's normal pacemaker. When the SA Node depolarizes, electrical signal spreads through the atrial muscle causing contraction.
Explanation:
Inherent rhythmicity / automaticity - The property of the pacemaker cells of the heart to start electrical sequence of depolarization and repolarization.
SA Node or Sino-atrial Node generates the electrical signal.
The electrical signal passes through internodal pathways, atrial fibres, atrioventricular node (AV Node), the bundle of His, Purkinje fibres, right bundle branch, left bundle branch.
Systole - Contraction of cells when the electrical signal of depolarization reaches the contractile cells.
Diastole - Relaxation of cells when the electrical signal of repolarization reaches the myocardial cells.
True, they have collected data from people with and without the flu virus
