Nurse on a general medical ward:
Monitoring of patients’ condition (so bp, o2 sats, heart rate etc) and recording these in notes
Drugs rounds, with multiple nurses needed to sign drugs out of the controlled drugs cabinet - that would things like opioids, for example. Ensuring that dosages are correct because nurses are responsible for what they administer and can’t just say ‘a dr told me to do it’ if they make a mistake
Wound care where required. Changing dressings, cleaning and so on.
Checking on things like IVs, O2 supplies etc
Catheterisation
Possibly taking blood samples? I can’t remember if this was a nurse thing, needed extra training etc
Taking care of patient needs like walking to the toilet etc - HCAs are also there to help with this
Laying out deceased patients
Liaising with other HCPs like doctors, physios, OTs etc. Possibly being an advocate for their patients as they probably spend the most time with them and know them best
Recording all of the above properly in the medical notes
From what I recall you’d expect maybe two trained nurses with HCAs and student nurses on a medical ward of 20-30 patients per shift - although it’s been a while since I was in a hospital.
My mum is a retired nurse and I was a bank ward clerk in the medical directorate of her hospital when I was a student - these are things I’ve watched nurses do or that mum has told me about. I’m sure there’s more! But it’s a much more technical job than I think many people expect, with things like drug calculations and the like.