The umbilical vein carries
Correct answer: B. oxygenated blood from the placenta to the fetus
- A. deoxygenated blood from the fetus to the placenta
- B. oxygenated blood from the placenta to the fetus
- C. fetal urine to the placenta for disposal
- D. maternal blood directly into the fetal circulation
Explanation
The cord contains two arteries and one vein, and as always the vein is named for the direction of flow towards the heart, so it brings oxygen and nutrients from the placenta to the fetus. The umbilical arteries do the reverse, carrying deoxygenated blood loaded with waste to the placenta. Maternal and fetal blood remain in separate vessels throughout, exchanging only by diffusion across the placental barrier.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Human Reproductive System
The human reproductive system includes the male and female organs that produce gametes, secrete sex hormones and support fertilization and development. Questions cover the testes, ovaries, reproductive ducts, menstrual and ovarian cycles, ovulation, fertilization, implantation, placenta formation and the roles of FSH, LH, oestrogen, progesterone and testosterone.
Practise Reproduction
1,220 free Reproduction MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Human Reproductive System questions
The fluid filled membrane that cushions the developing fetus and protects it from mechanical shock is the
Meiosis of one human primary oocyte finally produces
The number of chromosomes in a human secondary oocyte is
The female gonads that produce ova and secrete the hormones oestrogen and progesterone are the
The inner lining of the uterus, which thickens each cycle and is shed during menstruation, is the
After their production, spermatozoa mature and are temporarily stored in the