The ductus arteriosus allows fetal blood to move from the pulmonary trunk into the aorta. The ductus venosus on the other hand is a fetal vessel that transports blood from the umbilical vein to the inferior venacava. Ductus arteriosus is a blood vessel connecting the main pulmonary artery to the proximal descending aorta. It allows most of the blood from the right ventricle to bypass the fetus's fluid-filled non-functioning lungs.
The answer is bladder control usually is achieved before bowel control.
Bowel control usually is achieved before bladder control. The child should not be forced to sit for long periods . The ability to remove clothing is one of the physical signs of readiness for toilet training. The physical ability to control the urethral sphincters is achieved some time after the child is walking, probably between the ages of 18 and 24 months.
Answer:
Alternation of generations in plants permits both mitosis and meiosis but at different stages.
The zygote will undergo many rounds of <u>mitosis</u> and give rise to a diploid multicellular plant called a sporophyte. Specialized cells of the sporophyte will undergo <u>meiosis</u> and produce haploid spores.
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